| slovo | definícia |
valve
(encz) | valve,elektronka metan |
valve
(encz) | valve,chlopeň Zdeněk Brož |
valve
(encz) | valve,klapka Zdeněk Brož |
valve
(encz) | valve,šoupátko Zdeněk Brož |
valve
(encz) | valve,ventil n: |
valve
(encz) | valve,ventilek n: "u kola" |
valve
(encz) | valve,záklopka n: Zdeněk Brož |
Valve
(gcide) | Valve \Valve\, n. [L. valva the leaf, fold, or valve of a door:
cf. F. valve.]
[1913 Webster]
1. A door; especially, one of a pair of folding doors, or one
of the leaves of such a door.
[1913 Webster]
Swift through the valves the visionary fair
Repassed. --Pope.
[1913 Webster]
Heavily closed, . . . the valves of the barn doors.
--Longfellow.
[1913 Webster]
2. A lid, plug, or cover, applied to an aperture so that by
its movement, as by swinging, lifting and falling,
sliding, turning, or the like, it will open or close the
aperture to permit or prevent passage, as of a fluid.
[1913 Webster]
Note: A valve may act automatically so as to be opened by the
effort of a fluid to pass in one direction, and closed
by the effort to pass in the other direction, as a
clack valve; or it may be opened or closed by hand or
by mechanism, as a screw valve, or a slide valve.
[1913 Webster]
3. (Anat.) One or more membranous partitions, flaps, or
folds, which permit the passage of the contents of a
vessel or cavity in one direction, but stop or retard the
flow in the opposite direction; as, the ileocolic, mitral,
and semilunar valves.
[1913 Webster]
4. (Bot.)
(a) One of the pieces into which a capsule naturally
separates when it bursts.
(b) One of the two similar portions of the shell of a
diatom.
(c) A small portion of certain anthers, which opens like a
trapdoor to allow the pollen to escape, as in the
barberry.
[1913 Webster]
5. (Zool.) One of the pieces or divisions of bivalve or
multivalve shells.
[1913 Webster]
Air valve, Ball valve, Check valve, etc. See under
Air. Ball, Check, etc.
Double-beat valve, a kind of balance valve usually
consisting of a movable, open-ended, turban-shaped shell
provided with two faces of nearly equal diameters, one
above another, which rest upon two corresponding seats
when the valve is closed.
Equilibrium valve.
(a) A balance valve. See under Balance.
(b) A valve for permitting air, steam, water, etc., to
pass into or out of a chamber so as to establish or
maintain equal pressure within and without.
Valve chest (Mach.), a chamber in which a valve works;
especially (Steam Engine), the steam chest; -- called in
England valve box, and valve casing. See {Steam
chest}, under Steam.
Valve face (Mach.), that part of the surface of a valve
which comes in contact with the valve seat.
Valve gear, or Valve motion (Steam Engine), the system of
parts by which motion is given to the valve or valves for
the distribution of steam in the cylinder. For an
illustration of one form of valve gear, see Link motion.
Valve seat. (Mach.)
(a) The fixed surface on which a valve rests or against
which it presses.
(b) A part or piece on which such a surface is formed.
Valve stem (Mach.), a rod attached to a valve, for moving
it.
Valve yoke (Mach.), a strap embracing a slide valve and
connecting it to the valve stem.
[1913 Webster] |
valve
(wn) | valve
n 1: a structure in a hollow organ (like the heart) with a flap
to insure one-way flow of fluid through it
2: device in a brass wind instrument for varying the length of
the air column to alter the pitch of a tone
3: control consisting of a mechanical device for controlling the
flow of a fluid
4: the entire one-piece shell of a snail and certain other
molluscs
5: one of the paired hinged shells of certain molluscs and of
brachiopods |
valve
(foldoc) | valve
UK term for a vacuum tube.
(1996-01-10)
|
| | podobné slovo | definícia |
atrioventicular valve
(encz) | atrioventicular valve,cípatá chlopeň n: [med.] u člověka dvojcípá a
trojcípá Jirka Daněk |
ball valve
(encz) | ball valve,kulový kohout n: [tech.] Václav Kubíček |
bivalve
(encz) | bivalve,škeble n: Zdeněk Brož |
cardiac valve
(encz) | cardiac valve, n: |
clack valve
(encz) | clack valve, n: |
clapper valve
(encz) | clapper valve, n: |
emergency valve
(encz) | emergency valve,protihavarijní uzávěr [eko.] RNDr. Pavel Piskač |
escape valve
(encz) | escape valve, n: |
exhaust valve
(encz) | exhaust valve, n: |
heart valve
(encz) | heart valve, n: |
ileocecal valve
(encz) | ileocecal valve, n: |
intake valve
(encz) | intake valve, n: |
left atrioventricular valve
(encz) | left atrioventricular valve, n: |
mitral valve
(encz) | mitral valve, n: |
mitral valve prolapse
(encz) | mitral valve prolapse, n: |
mitral valve stenosis
(encz) | mitral valve stenosis, n: |
poppet valve
(encz) | poppet valve, n: |
pulmonary valve
(encz) | pulmonary valve, n: |
pyloric valve
(encz) | pyloric valve, n: |
rectifying valve
(encz) | rectifying valve, n: |
reducing valve
(encz) | reducing valve,škrtící ventil [stav.] Oldřich Švec |
relief valve
(encz) | relief valve,přepouštěcí ventil n: [tech.] Suky |
relieve valve
(encz) | relieve valve,ventil pojistný n: Suky |
right atrioventricular valve
(encz) | right atrioventricular valve, n: |
safety valve
(encz) | safety valve,pojistná záklopka n: Zdeněk Brožsafety valve,pojistný ventil Zdeněk Brožsafety valve,přetlakový ventil Zdeněk Brož |
semilunar valve
(encz) | semilunar valve,poloměsíčitá chlopeň n: [med.] v lidském srdci Jirka
Daněk |
slide valve
(encz) | slide valve, n: |
sluice valve
(encz) | sluice valve, n: |
solenoid valve
(encz) | solenoid valve,elektromagnetický ventil n: [tech.] cartime.eu |
spiral valve
(encz) | spiral valve,spirální řasa n: [bio.] tyflosolis Jirka Daněk |
thermionic valve
(encz) | thermionic valve,elektronka metan |
throttle valve
(encz) | throttle valve, n: |
tricuspid valve
(encz) | tricuspid valve, n: |
univalve
(encz) | univalve,mající jednu lasturu Zdeněk Brož |
valve
(encz) | valve,elektronka metanvalve,chlopeň Zdeněk Brožvalve,klapka Zdeněk Brožvalve,šoupátko Zdeněk Brožvalve,ventil n: valve,ventilek n: "u kola" valve,záklopka n: Zdeněk Brož |
valve rocker
(encz) | valve rocker, n: |
valve-in-head engine
(encz) | valve-in-head engine, n: |
valved
(encz) | valved,ventilový adj: Zdeněk Brož |
valveless
(encz) | valveless,bezventilový adj: Zdeněk Brož |
valvelet
(encz) | valvelet, n: |
valves
(encz) | valves,ventily n: pl. Zdeněk Brož |
Air valve
(gcide) | Valve \Valve\, n. [L. valva the leaf, fold, or valve of a door:
cf. F. valve.]
[1913 Webster]
1. A door; especially, one of a pair of folding doors, or one
of the leaves of such a door.
[1913 Webster]
Swift through the valves the visionary fair
Repassed. --Pope.
[1913 Webster]
Heavily closed, . . . the valves of the barn doors.
--Longfellow.
[1913 Webster]
2. A lid, plug, or cover, applied to an aperture so that by
its movement, as by swinging, lifting and falling,
sliding, turning, or the like, it will open or close the
aperture to permit or prevent passage, as of a fluid.
[1913 Webster]
Note: A valve may act automatically so as to be opened by the
effort of a fluid to pass in one direction, and closed
by the effort to pass in the other direction, as a
clack valve; or it may be opened or closed by hand or
by mechanism, as a screw valve, or a slide valve.
[1913 Webster]
3. (Anat.) One or more membranous partitions, flaps, or
folds, which permit the passage of the contents of a
vessel or cavity in one direction, but stop or retard the
flow in the opposite direction; as, the ileocolic, mitral,
and semilunar valves.
[1913 Webster]
4. (Bot.)
(a) One of the pieces into which a capsule naturally
separates when it bursts.
(b) One of the two similar portions of the shell of a
diatom.
(c) A small portion of certain anthers, which opens like a
trapdoor to allow the pollen to escape, as in the
barberry.
[1913 Webster]
5. (Zool.) One of the pieces or divisions of bivalve or
multivalve shells.
[1913 Webster]
Air valve, Ball valve, Check valve, etc. See under
Air. Ball, Check, etc.
Double-beat valve, a kind of balance valve usually
consisting of a movable, open-ended, turban-shaped shell
provided with two faces of nearly equal diameters, one
above another, which rest upon two corresponding seats
when the valve is closed.
Equilibrium valve.
(a) A balance valve. See under Balance.
(b) A valve for permitting air, steam, water, etc., to
pass into or out of a chamber so as to establish or
maintain equal pressure within and without.
Valve chest (Mach.), a chamber in which a valve works;
especially (Steam Engine), the steam chest; -- called in
England valve box, and valve casing. See {Steam
chest}, under Steam.
Valve face (Mach.), that part of the surface of a valve
which comes in contact with the valve seat.
Valve gear, or Valve motion (Steam Engine), the system of
parts by which motion is given to the valve or valves for
the distribution of steam in the cylinder. For an
illustration of one form of valve gear, see Link motion.
Valve seat. (Mach.)
(a) The fixed surface on which a valve rests or against
which it presses.
(b) A part or piece on which such a surface is formed.
Valve stem (Mach.), a rod attached to a valve, for moving
it.
Valve yoke (Mach.), a strap embracing a slide valve and
connecting it to the valve stem.
[1913 Webster]Air \Air\ ([^a]r), n. [OE. air, eir, F. air, L. a["e]r, fr. Gr.
'ah`r, air, mist, for 'a[digamma]hr, fr. root 'a[digamma] to
blow, breathe, probably akin to E. wind. In sense 10 the
French has taking a meaning fr. It. aria atmosphere, air, fr.
the same Latin word; and in senses 11, 12, 13 the French
meaning is either fr. L. aria, or due to confusion with F.
aire, in an older sense of origin, descent. Cf. A["e]ry,
Debonair, Malaria, Wind.]
1. The fluid which we breathe, and which surrounds the earth;
the atmosphere. It is invisible, inodorous, insipid,
transparent, compressible, elastic, and ponderable.
[1913 Webster]
Note: By the ancient philosophers, air was regarded as an
element; but modern science has shown that it is
essentially a mixture of oxygen and nitrogen, with a
small amount of carbon dioxide, the average proportions
being, by volume: oxygen, 20.96 per cent.; nitrogen,
79.00 per cent.; carbon dioxide, 0.04 per cent. These
proportions are subject to a very slight variability.
Air also always contains some vapor of water.
[1913 Webster]
2. Symbolically: Something unsubstantial, light, or volatile.
"Charm ache with air." --Shak.
[1913 Webster]
He was still all air and fire. [Air and fire being
the finer and quicker elements as opposed to earth and
water.] --Macaulay
.
[1913 Webster]
3. A particular state of the atmosphere, as respects heat,
cold, moisture, etc., or as affecting the sensations; as,
a smoky air, a damp air, the morning air, etc.
[1913 Webster]
4. Any a["e]riform body; a gas; as, oxygen was formerly
called vital air. [Obs.]
[1913 Webster]
5. Air in motion; a light breeze; a gentle wind.
[1913 Webster]
Let vernal airs through trembling osiers play.
--Pope.
[1913 Webster]
6. Odoriferous or contaminated air.
[1913 Webster]
7. That which surrounds and influences.
[1913 Webster]
The keen, the wholesome air of poverty.
--Wordsworth.
[1913 Webster]
8. Utterance abroad; publicity; vent.
[1913 Webster]
You gave it air before me. --Dryden.
[1913 Webster]
9. Intelligence; information. [Obs.] --Bacon.
[1913 Webster]
10. (Mus.)
(a) A musical idea, or motive, rhythmically developed in
consecutive single tones, so as to form a symmetrical
and balanced whole, which may be sung by a single
voice to the stanzas of a hymn or song, or even to
plain prose, or played upon an instrument; a melody;
a tune; an aria.
(b) In harmonized chorals, psalmody, part songs, etc.,
the part which bears the tune or melody -- in modern
harmony usually the upper part -- is sometimes called
the air.
[1913 Webster]
11. The peculiar look, appearance, and bearing of a person;
mien; demeanor; as, the air of a youth; a heavy air; a
lofty air. "His very air." --Shak.
[1913 Webster]
12. Peculiar appearance; apparent character; semblance;
manner; style.
[1913 Webster]
It was communicated with the air of a secret.
--Pope.
[1913 Webster]
12. pl. An artificial or affected manner; show of pride or
vanity; haughtiness; as, it is said of a person, he puts
on airs. --Thackeray.
[1913 Webster]
14. (Paint.)
(a) The representation or reproduction of the effect of
the atmospheric medium through which every object in
nature is viewed. --New Am. Cyc.
(b) Carriage; attitude; action; movement; as, the head of
that portrait has a good air. --Fairholt.
[1913 Webster]
15. (Man.) The artificial motion or carriage of a horse.
[1913 Webster]
Note: Air is much used adjectively or as the first part of a
compound term. In most cases it might be written
indifferently, as a separate limiting word, or as the
first element of the compound term, with or without the
hyphen; as, air bladder, air-bladder, or airbladder;
air cell, air-cell, or aircell; air-pump, or airpump.
[1913 Webster]
Air balloon. See Balloon.
Air bath.
(a) An apparatus for the application of air to the body.
(b) An arrangement for drying substances in air of any
desired temperature.
Air castle. See Castle in the air, under Castle.
Air compressor, a machine for compressing air to be used as
a motive power.
Air crossing, a passage for air in a mine.
Air cushion, an air-tight cushion which can be inflated;
also, a device for arresting motion without shock by
confined air.
Air fountain, a contrivance for producing a jet of water by
the force of compressed air.
Air furnace, a furnace which depends on a natural draft and
not on blast.
Air line, a straight line; a bee line. Hence
Air-line, adj.; as, air-line road.
Air lock (Hydr. Engin.), an intermediate chamber between
the outer air and the compressed-air chamber of a
pneumatic caisson. --Knight.
Air port (Nav.), a scuttle or porthole in a ship to admit
air.
Air spring, a spring in which the elasticity of air is
utilized.
Air thermometer, a form of thermometer in which the
contraction and expansion of air is made to measure
changes of temperature.
Air threads, gossamer.
Air trap, a contrivance for shutting off foul air or gas
from drains, sewers, etc.; a stench trap.
Air trunk, a pipe or shaft for conducting foul or heated
air from a room.
Air valve, a valve to regulate the admission or egress of
air; esp. a valve which opens inwardly in a steam boiler
and allows air to enter.
Air way, a passage for a current of air; as the air way of
an air pump; an air way in a mine.
In the air.
(a) Prevalent without traceable origin or authority, as
rumors.
(b) Not in a fixed or stable position; unsettled.
(c) (Mil.) Unsupported and liable to be turned or taken
in flank; as, the army had its wing in the air.
on the air, currently transmitting; live; -- used of radio
and television broadcasts, to indicate that the images and
sounds being picked up by cameras and microphones are
being broadcast at the present moment.
Note: In call-in programs where individuals outside a radio
or television studio have telephoned into the station,
when their voice is being directly broadcast, the host
of the program commonly states "You're on the air." as
a warning that the conversation is not private.
To take air, to be divulged; to be made public.
To take the air, to go abroad; to walk or ride out.
[1913 Webster] |
Balance valve
(gcide) | Balance \Bal"ance\ (b[a^]l"ans), n. [OE. balaunce, F. balance,
fr. L. bilanx, bilancis, having two scales; bis twice (akin
to E. two) + lanx plate, scale.]
1. An apparatus for weighing.
[1913 Webster]
Note: In its simplest form, a balance consists of a beam or
lever supported exactly in the middle, having two
scales or basins of equal weight suspended from its
extremities. Another form is that of the Roman balance,
our steelyard, consisting of a lever or beam, suspended
near one of its extremities, on the longer arm of which
a counterpoise slides. The name is also given to other
forms of apparatus for weighing bodies, as to the
combinations of levers making up platform scales; and
even to devices for weighing by the elasticity of a
spring.
[1913 Webster]
2. Act of weighing mentally; comparison; estimate.
[1913 Webster]
A fair balance of the advantages on either side.
--Atterbury.
[1913 Webster]
3. Equipoise between the weights in opposite scales.
[1913 Webster]
4. The state of being in equipoise; equilibrium; even
adjustment; steadiness.
[1913 Webster]
And hung a bottle on each side
To make his balance true. --Cowper.
[1913 Webster]
The order and balance of the country were destroyed.
--Buckle.
[1913 Webster]
English workmen completely lose their balance. --J.
S. Mill.
[1913 Webster]
5. An equality between the sums total of the two sides of an
account; as, to bring one's accounts to a balance; --
also, the excess on either side; as, the balance of an
account. "A balance at the banker's." --Thackeray.
[1913 Webster]
I still think the balance of probabilities leans
towards the account given in the text. --J. Peile.
[1913 Webster]
6. (Horol.) A balance wheel, as of a watch, or clock. See
Balance wheel (in the Vocabulary).
[1913 Webster]
7. (Astron.)
(a) The constellation Libra.
(b) The seventh sign in the Zodiac, called Libra, which
the sun enters at the equinox in September.
[1913 Webster]
8. A movement in dancing. See Balance, v. t., 8.
[1913 Webster]
Balance electrometer, a kind of balance, with a poised
beam, which indicates, by weights suspended from one arm,
the mutual attraction of oppositely electrified surfaces.
--Knight.
Balance fish. (Zool.) See Hammerhead.
Balance knife, a carving or table knife the handle of which
overbalances the blade, and so keeps it from contact with
the table.
Balance of power (Politics), such an adjustment of power
among sovereign states that no one state is in a position
to interfere with the independence of the others;
international equilibrium; also, the ability (of a state
or a third party within a state) to control the relations
between sovereign states or between dominant parties in a
state.
Balance sheet (Bookkeeping), a paper showing the balances
of the open accounts of a business, the debit and credit
balances footing up equally, if the system of accounts be
complete and the balances correctly taken.
Balance thermometer, a thermometer mounted as a balance so
that the movement of the mercurial column changes the
inclination of the tube. With the aid of electrical or
mechanical devices adapted to it, it is used for the
automatic regulation of the temperature of rooms warmed
artificially, and as a fire alarm.
Balance of torsion. See Torsion Balance.
Balance of trade (Pol. Econ.), an equilibrium between the
money values of the exports and imports of a country; or
more commonly, the amount required on one side or the
other to make such an equilibrium.
Balance valve, a valve whose surfaces are so arranged that
the fluid pressure tending to seat, and that tending to
unseat, the valve, are nearly in equilibrium; esp., a
puppet valve which is made to operate easily by the
admission of steam to both sides. See Puppet valve.
Hydrostatic balance. See under Hydrostatic.
To lay in balance, to put up as a pledge or security.
[Obs.] --Chaucer.
To strike a balance, to find out the difference between the
debit and credit sides of an account.
[1913 Webster] |
Balanced valve
(gcide) | Balance \Bal"ance\ (b[a^]l"ans), v. t. [imp. & p. p. Balanced
(b[a^]l"anst); p. pr. & vb. n. Balancing
(b[a^]l"an*s[i^]ng).] [From Balance, n.: cf. F. balancer.]
1. To bring to an equipoise, as the scales of a balance by
adjusting the weights; to weigh in a balance.
[1913 Webster]
2. To support on a narrow base, so as to keep from falling;
as, to balance a plate on the end of a cane; to balance
one's self on a tight rope.
[1913 Webster]
3. To equal in number, weight, force, or proportion; to
counterpoise, counterbalance, counteract, or neutralize.
[1913 Webster]
One expression . . . must check and balance another.
--Kent.
[1913 Webster]
4. To compare in relative force, importance, value, etc.; to
estimate.
[1913 Webster]
Balance the good and evil of things. --L'Estrange.
[1913 Webster]
5. To settle and adjust, as an account; to make two accounts
equal by paying the difference between them.
[1913 Webster]
I am very well satisfied that it is not in my power
to balance accounts with my Maker. --Addison.
[1913 Webster]
6. To make the sums of the debits and credits of an account
equal; -- said of an item; as, this payment, or credit,
balances the account.
[1913 Webster]
7. To arrange accounts in such a way that the sum total of
the debits is equal to the sum total of the credits; as,
to balance a set of books.
[1913 Webster]
8. (Dancing) To move toward, and then back from,
reciprocally; as, to balance partners.
[1913 Webster]
9. (Naut.) To contract, as a sail, into a narrower compass;
as, to balance the boom mainsail.
[1913 Webster]
Balanced valve. See Balance valve, under Balance, n.
[1913 Webster]
Syn: To poise; weigh; adjust; counteract; neutralize;
equalize.
[1913 Webster] |
Ball valve
(gcide) | Valve \Valve\, n. [L. valva the leaf, fold, or valve of a door:
cf. F. valve.]
[1913 Webster]
1. A door; especially, one of a pair of folding doors, or one
of the leaves of such a door.
[1913 Webster]
Swift through the valves the visionary fair
Repassed. --Pope.
[1913 Webster]
Heavily closed, . . . the valves of the barn doors.
--Longfellow.
[1913 Webster]
2. A lid, plug, or cover, applied to an aperture so that by
its movement, as by swinging, lifting and falling,
sliding, turning, or the like, it will open or close the
aperture to permit or prevent passage, as of a fluid.
[1913 Webster]
Note: A valve may act automatically so as to be opened by the
effort of a fluid to pass in one direction, and closed
by the effort to pass in the other direction, as a
clack valve; or it may be opened or closed by hand or
by mechanism, as a screw valve, or a slide valve.
[1913 Webster]
3. (Anat.) One or more membranous partitions, flaps, or
folds, which permit the passage of the contents of a
vessel or cavity in one direction, but stop or retard the
flow in the opposite direction; as, the ileocolic, mitral,
and semilunar valves.
[1913 Webster]
4. (Bot.)
(a) One of the pieces into which a capsule naturally
separates when it bursts.
(b) One of the two similar portions of the shell of a
diatom.
(c) A small portion of certain anthers, which opens like a
trapdoor to allow the pollen to escape, as in the
barberry.
[1913 Webster]
5. (Zool.) One of the pieces or divisions of bivalve or
multivalve shells.
[1913 Webster]
Air valve, Ball valve, Check valve, etc. See under
Air. Ball, Check, etc.
Double-beat valve, a kind of balance valve usually
consisting of a movable, open-ended, turban-shaped shell
provided with two faces of nearly equal diameters, one
above another, which rest upon two corresponding seats
when the valve is closed.
Equilibrium valve.
(a) A balance valve. See under Balance.
(b) A valve for permitting air, steam, water, etc., to
pass into or out of a chamber so as to establish or
maintain equal pressure within and without.
Valve chest (Mach.), a chamber in which a valve works;
especially (Steam Engine), the steam chest; -- called in
England valve box, and valve casing. See {Steam
chest}, under Steam.
Valve face (Mach.), that part of the surface of a valve
which comes in contact with the valve seat.
Valve gear, or Valve motion (Steam Engine), the system of
parts by which motion is given to the valve or valves for
the distribution of steam in the cylinder. For an
illustration of one form of valve gear, see Link motion.
Valve seat. (Mach.)
(a) The fixed surface on which a valve rests or against
which it presses.
(b) A part or piece on which such a surface is formed.
Valve stem (Mach.), a rod attached to a valve, for moving
it.
Valve yoke (Mach.), a strap embracing a slide valve and
connecting it to the valve stem.
[1913 Webster]Ball \Ball\ (b[add]l), n. [OE. bal, balle; akin to OHG. balla,
palla, G. ball, Icel. b["o]llr, ball; cf. F. balle. Cf. 1st
Bale, n., Pallmall.]
1. Any round or roundish body or mass; a sphere or globe; as,
a ball of twine; a ball of snow.
[1913 Webster]
2. A spherical body of any substance or size used to play
with, as by throwing, knocking, kicking, etc.
[1913 Webster]
3. A general name for games in which a ball is thrown,
kicked, or knocked. See Baseball, and Football.
[1913 Webster]
4. Any solid spherical, cylindrical, or conical projectile of
lead or iron, to be discharged from a firearm; as, a
cannon ball; a rifle ball; -- often used collectively; as,
powder and ball. Spherical balls for the smaller firearms
are commonly called bullets.
[1913 Webster]
5. (Pyrotechnics & Mil.) A flaming, roundish body shot into
the air; a case filled with combustibles intended to burst
and give light or set fire, or to produce smoke or stench;
as, a fire ball; a stink ball.
[1913 Webster]
6. (Print.) A leather-covered cushion, fastened to a handle
called a ballstock; -- formerly used by printers for
inking the form, but now superseded by the roller.
[1913 Webster]
7. A roundish protuberant portion of some part of the body;
as, the ball of the thumb; the ball of the foot.
[1913 Webster]
8. (Far.) A large pill, a form in which medicine is commonly
given to horses; a bolus. --White.
[1913 Webster]
9. The globe or earth. --Pope.
[1913 Webster]
Move round the dark terrestrial ball. --Addison.
[1913 Webster]
10. (Baseball) A pitched ball, not struck at by the batter,
which fails to pass over the home plate at a height not
greater than the batter's shoulder nor less than his knee
(i.e. it is outside the strike zone). If the pitcher
pitches four balls before three strikes are called, the
batter advances to first base, and the action of pitching
four balls is called a walk.
[Webster 1913 Suppl. +PJC]
10. a testicle; usually used in the plural. [vulgar]
[PJC]
11. pl. courage; nerve. [vulgar]
[PJC]
Ball and socket joint, a joint in which a ball moves within
a socket, so as to admit of motion in every direction
within certain limits.
Ball bearings, a mechanical device for lessening the
friction of axle bearings by means of small loose metal
balls.
Ball cartridge, a cartridge containing a ball, as
distinguished from a blank cartridge, containing only
powder.
Ball cock, a faucet or valve which is opened or closed by
the fall or rise of a ball floating in water at the end of
a lever.
Ball gudgeon, a pivot of a spherical form, which permits
lateral deflection of the arbor or shaft, while retaining
the pivot in its socket. --Knight.
Ball lever, the lever used in a ball cock.
Ball of the eye, the eye itself, as distinguished from its
lids and socket; -- formerly, the pupil of the eye.
Ball valve (Mach.), a contrivance by which a ball, placed
in a circular cup with a hole in its bottom, operates as a
valve.
Ball vein (Mining), a sort of iron ore, found in loose
masses of a globular form, containing sparkling particles.
Three balls, or Three golden balls, a pawnbroker's sign
or shop.
on the ball alert; competent and knowledgeable.
to carry the ball to carry on the task; to assume the
responsibility.
to drop the ball to fail to perform as expected; to fail to
live up to a responsibility.
[1913 Webster]
Syn: See Globe.
[1913 Webster] |
Bivalve
(gcide) | Bivalve \Bi"valve\, n. [F. bivalve; bi- (L. bis) + valve valve.]
1. (Zool.) A mollusk having a shell consisting of two lateral
plates or valves joined together by an elastic ligament at
the hinge, which is usually strengthened by prominences
called teeth. The shell is closed by the contraction of
two transverse muscles attached to the inner surface, as
in the clam, -- or by one, as in the oyster. See Mollusca.
[1913 Webster]
2. (Bot.) A pericarp in which the seed case opens or splits
into two parts or valves.
[1913 Webster]Bivalve \Bi"valve\, a. [Pref. bi- + valve.] (Zool. & Bot.)
Having two shells or valves which open and shut, as the
oyster and certain seed vessels.
[1913 Webster] |
Bivalved
(gcide) | Bivalved \Bi"valved\, a.
Having two valves, as the oyster and some seed pods; bivalve.
[1913 Webster] |
Blow valve
(gcide) | Blow valve \Blow" valve`\ (Mach.)
See Snifting valve.
[1913 Webster] |
Butterfly valve
(gcide) | Butterfly \But"ter*fly`\, n.; pl. Butterflies. [Perh. from the
color of a yellow species. AS. buter-fl[=e]ge,
buttor-fle['o]ge; cf. G. butterfliege, D. botervlieg. See
Butter, and Fly.] (Zool.)
A general name for the numerous species of diurnal
Lepidoptera.
Note: [See Illust. under Aphrodite.]
[1913 Webster]
Asclepias butterfly. See under Asclepias.
Butterfly fish (Zool.), the ocellated blenny ({Blennius
ocellaris}) of Europe. See Blenny. The term is also
applied to the flying gurnard.
Butterfly shell (Zool.), a shell of the genus Voluta.
Butterfly valve (Mech.), a kind of double clack valve,
consisting of two semicircular clappers or wings hinged to
a cross rib in the pump bucket. When open it somewhat
resembles a butterfly in shape.
[1913 Webster] |
Check valve
(gcide) | Valve \Valve\, n. [L. valva the leaf, fold, or valve of a door:
cf. F. valve.]
[1913 Webster]
1. A door; especially, one of a pair of folding doors, or one
of the leaves of such a door.
[1913 Webster]
Swift through the valves the visionary fair
Repassed. --Pope.
[1913 Webster]
Heavily closed, . . . the valves of the barn doors.
--Longfellow.
[1913 Webster]
2. A lid, plug, or cover, applied to an aperture so that by
its movement, as by swinging, lifting and falling,
sliding, turning, or the like, it will open or close the
aperture to permit or prevent passage, as of a fluid.
[1913 Webster]
Note: A valve may act automatically so as to be opened by the
effort of a fluid to pass in one direction, and closed
by the effort to pass in the other direction, as a
clack valve; or it may be opened or closed by hand or
by mechanism, as a screw valve, or a slide valve.
[1913 Webster]
3. (Anat.) One or more membranous partitions, flaps, or
folds, which permit the passage of the contents of a
vessel or cavity in one direction, but stop or retard the
flow in the opposite direction; as, the ileocolic, mitral,
and semilunar valves.
[1913 Webster]
4. (Bot.)
(a) One of the pieces into which a capsule naturally
separates when it bursts.
(b) One of the two similar portions of the shell of a
diatom.
(c) A small portion of certain anthers, which opens like a
trapdoor to allow the pollen to escape, as in the
barberry.
[1913 Webster]
5. (Zool.) One of the pieces or divisions of bivalve or
multivalve shells.
[1913 Webster]
Air valve, Ball valve, Check valve, etc. See under
Air. Ball, Check, etc.
Double-beat valve, a kind of balance valve usually
consisting of a movable, open-ended, turban-shaped shell
provided with two faces of nearly equal diameters, one
above another, which rest upon two corresponding seats
when the valve is closed.
Equilibrium valve.
(a) A balance valve. See under Balance.
(b) A valve for permitting air, steam, water, etc., to
pass into or out of a chamber so as to establish or
maintain equal pressure within and without.
Valve chest (Mach.), a chamber in which a valve works;
especially (Steam Engine), the steam chest; -- called in
England valve box, and valve casing. See {Steam
chest}, under Steam.
Valve face (Mach.), that part of the surface of a valve
which comes in contact with the valve seat.
Valve gear, or Valve motion (Steam Engine), the system of
parts by which motion is given to the valve or valves for
the distribution of steam in the cylinder. For an
illustration of one form of valve gear, see Link motion.
Valve seat. (Mach.)
(a) The fixed surface on which a valve rests or against
which it presses.
(b) A part or piece on which such a surface is formed.
Valve stem (Mach.), a rod attached to a valve, for moving
it.
Valve yoke (Mach.), a strap embracing a slide valve and
connecting it to the valve stem.
[1913 Webster]Check \Check\ (ch[e^]k), n. [OE. chek, OF. eschec, F. ['e]chec,
a stop, hindrance, orig. check in the game of chess, pl.
['e]checs chess, through Ar., fr. Pers. sh[=a]h king. See
Shah, and cf. Checkmate, Chess, Checker.]
1. (Chess) A word of warning denoting that the king is in
danger; such a menace of a player's king by an adversary's
move as would, if it were any other piece, expose it to
immediate capture. A king so menaced is said to be in
check, and must be made safe at the next move.
[1913 Webster]
2. A condition of interrupted or impeded progress; arrest;
stop; delay; as, to hold an enemy in check.
[1913 Webster]
Which gave a remarkable check to the first progress
of Christianity. --Addison.
[1913 Webster]
No check, no stay, this streamlet fears.
--Wordsworth.
[1913 Webster]
3. Whatever arrests progress, or limits action; an obstacle,
guard, restraint, or rebuff.
[1913 Webster]
Useful check upon the administration of government.
--Washington.
[1913 Webster]
A man whom no check could abash. --Macaulay.
[1913 Webster]
4. A mark, certificate, or token, by which, errors may be
prevented, or a thing or person may be identified; as,
checks placed against items in an account; a check given
for baggage; a return check on a railroad.
[1913 Webster]
5. A written order directing a bank or banker to pay money as
therein stated. See Bank check, below.
[1913 Webster]
6. A woven or painted design in squares resembling the patten
of a checkerboard; one of the squares of such a design;
also, cloth having such a figure.
[1913 Webster]
7. (Falconry) The forsaking by a hawk of its proper game to
follow other birds.
[1913 Webster]
8. Small chick or crack.
[1913 Webster]
Bank check, a written order on a banker or broker to pay
money in his keeping belonging to the signer.
Check book, a book containing blank forms for checks upon a
bank.
Check hook, a hook on the saddle of a harness, over which a
checkrein is looped.
Check list, a list or catalogue by which things may be
verified, or on which they may be checked.
Check nut (Mech.), a secondary nut, screwing down upon the
primary nut to secure it. --Knight.
Check valve (Mech.), a valve in the feed pipe of a boiler,
or other conduit, to prevent the return of the feed water
or other fluid.
To take check, to take offense. [Obs.] --Dryden.
Syn: Hindrance; setback; interruption; obstruction;
reprimand; censure; rebuke; reproof; repulse; rebuff;
tally; counterfoil; counterbalance; ticket; draft.
[1913 Webster] |
Clack valve
(gcide) | Clack \Clack\, n. [Cf. F. claque a slap or smack, MHG. klac
crack, W. clec crack, gossip. See Clack, v. t.]
1. A sharp, abrupt noise, or succession of noises, made by
striking an object.
[1913 Webster]
2. Anything that causes a clacking noise, as the clapper of a
mill, or a clack valve.
[1913 Webster]
3. Continual or importunate talk; prattle; prating.
[1913 Webster]
Whose chief intent is to vaunt his spiritual clack.
--South.
[1913 Webster]
Clack box (Mach.), the box or chamber in which a clack
valve works.
Clack dish, a dish with a movable lid, formerly carried by
beggars, who clacked the lid to attract notice. --Shak.
[1913 Webster]
Clack door (Mining), removable cover of the opening through
which access is had to a pump valve.
Clack valve (Mach.), a valve; esp. one hinged at one edge,
which, when raised from its seat, falls with a clacking
sound.
[1913 Webster] |
D valve
(gcide) | Slide \Slide\, n. [AS. sl[imac]de.]
1. The act of sliding; as, a slide on the ice.
[1913 Webster]
2. Smooth, even passage or progress.
[1913 Webster]
A better slide into their business. --Bacon.
[1913 Webster]
3. That on which anything moves by sliding. Specifically:
(a) An inclined plane on which heavy bodies slide by the
force of gravity, esp. one constructed on a mountain
side for conveying logs by sliding them down.
(b) A surface of ice or snow on which children slide for
amusement.
[1913 Webster]
4. That which operates by sliding. Specifically:
(a) A cover which opens or closes an aperture by sliding
over it.
(b) (Mach.) A moving piece which is guided by a part or
parts along which it slides.
(c) A clasp or brooch for a belt, or the like.
[1913 Webster]
5. A plate or slip of glass on which is a picture or
delineation to be exhibited by means of a magic lantern,
stereopticon, or the like; a plate on which is an object
to be examined with a microscope.
[1913 Webster]
6. The descent of a mass of earth, rock, or snow down a hill
or mountain side; as, a land slide, or a snow slide; also,
the track of bare rock left by a land slide.
[1913 Webster]
7. (Geol.) A small dislocation in beds of rock along a line
of fissure. --Dana.
[1913 Webster]
8. (Mus.)
(a) A grace consisting of two or more small notes moving
by conjoint degrees, and leading to a principal note
either above or below.
(b) An apparatus in the trumpet and trombone by which the
sounding tube is lengthened and shortened so as to
produce the tones between the fundamental and its
harmonics.
[1913 Webster]
9. (Phonetics) A sound which, by a gradual change in the
position of the vocal organs, passes imperceptibly into
another sound.
[1913 Webster]
10. (Steam Engine)
(a) Same as Guide bar, under Guide.
(b) A slide valve.
[1913 Webster]
Slide box (Steam Engine), a steam chest. See under Steam.
Slide lathe, an engine lathe. See under Lathe.
Slide rail, a transfer table. See under Transfer.
Slide rest (Turning lathes), a contrivance for holding,
moving, and guiding, the cutting tool, made to slide on
ways or guides by screws or otherwise, and having compound
motion.
Slide rule, a mathematical instrument consisting of two
parts, one of which slides upon the other, for the
mechanical performance of addition and subtraction, and,
by means of logarithmic scales, of multiplication and
division.
Slide valve.
(a) Any valve which opens and closes a passageway by
sliding over a port.
(b) A particular kind of sliding valve, often used in
steam engines for admitting steam to the piston and
releasing it, alternately, having a cuplike cavity in
its face, through which the exhaust steam passes. It
is situated in the steam chest, and moved by the
valve gear. It is sometimes called a D valve, -- a
name which is also applied to a semicylindrical pipe
used as a sliding valve.
[1913 Webster] In the illustration, a is the cylinder
of a steam engine, in which plays the piston p; b the
steam chest, receiving its supply from the pipe i,
and containing the slide valve s, which is shown as
admitting steam to one end of the cylinder through
the port e, and opening communication between the
exhaust passage f and the port c, for the release of
steam from the opposite end of the cylinder.
[1913 Webster]D valve \D" valve`\ (Mech.)
A kind of slide valve. See Slide valve, under Slide.
[1913 Webster] |
Double-beat valve
(gcide) | Valve \Valve\, n. [L. valva the leaf, fold, or valve of a door:
cf. F. valve.]
[1913 Webster]
1. A door; especially, one of a pair of folding doors, or one
of the leaves of such a door.
[1913 Webster]
Swift through the valves the visionary fair
Repassed. --Pope.
[1913 Webster]
Heavily closed, . . . the valves of the barn doors.
--Longfellow.
[1913 Webster]
2. A lid, plug, or cover, applied to an aperture so that by
its movement, as by swinging, lifting and falling,
sliding, turning, or the like, it will open or close the
aperture to permit or prevent passage, as of a fluid.
[1913 Webster]
Note: A valve may act automatically so as to be opened by the
effort of a fluid to pass in one direction, and closed
by the effort to pass in the other direction, as a
clack valve; or it may be opened or closed by hand or
by mechanism, as a screw valve, or a slide valve.
[1913 Webster]
3. (Anat.) One or more membranous partitions, flaps, or
folds, which permit the passage of the contents of a
vessel or cavity in one direction, but stop or retard the
flow in the opposite direction; as, the ileocolic, mitral,
and semilunar valves.
[1913 Webster]
4. (Bot.)
(a) One of the pieces into which a capsule naturally
separates when it bursts.
(b) One of the two similar portions of the shell of a
diatom.
(c) A small portion of certain anthers, which opens like a
trapdoor to allow the pollen to escape, as in the
barberry.
[1913 Webster]
5. (Zool.) One of the pieces or divisions of bivalve or
multivalve shells.
[1913 Webster]
Air valve, Ball valve, Check valve, etc. See under
Air. Ball, Check, etc.
Double-beat valve, a kind of balance valve usually
consisting of a movable, open-ended, turban-shaped shell
provided with two faces of nearly equal diameters, one
above another, which rest upon two corresponding seats
when the valve is closed.
Equilibrium valve.
(a) A balance valve. See under Balance.
(b) A valve for permitting air, steam, water, etc., to
pass into or out of a chamber so as to establish or
maintain equal pressure within and without.
Valve chest (Mach.), a chamber in which a valve works;
especially (Steam Engine), the steam chest; -- called in
England valve box, and valve casing. See {Steam
chest}, under Steam.
Valve face (Mach.), that part of the surface of a valve
which comes in contact with the valve seat.
Valve gear, or Valve motion (Steam Engine), the system of
parts by which motion is given to the valve or valves for
the distribution of steam in the cylinder. For an
illustration of one form of valve gear, see Link motion.
Valve seat. (Mach.)
(a) The fixed surface on which a valve rests or against
which it presses.
(b) A part or piece on which such a surface is formed.
Valve stem (Mach.), a rod attached to a valve, for moving
it.
Valve yoke (Mach.), a strap embracing a slide valve and
connecting it to the valve stem.
[1913 Webster]Double-beat valve \Dou"ble-beat` valve"\
See under Valve.
[1913 Webster] |
Equilibrium valve
(gcide) | Valve \Valve\, n. [L. valva the leaf, fold, or valve of a door:
cf. F. valve.]
[1913 Webster]
1. A door; especially, one of a pair of folding doors, or one
of the leaves of such a door.
[1913 Webster]
Swift through the valves the visionary fair
Repassed. --Pope.
[1913 Webster]
Heavily closed, . . . the valves of the barn doors.
--Longfellow.
[1913 Webster]
2. A lid, plug, or cover, applied to an aperture so that by
its movement, as by swinging, lifting and falling,
sliding, turning, or the like, it will open or close the
aperture to permit or prevent passage, as of a fluid.
[1913 Webster]
Note: A valve may act automatically so as to be opened by the
effort of a fluid to pass in one direction, and closed
by the effort to pass in the other direction, as a
clack valve; or it may be opened or closed by hand or
by mechanism, as a screw valve, or a slide valve.
[1913 Webster]
3. (Anat.) One or more membranous partitions, flaps, or
folds, which permit the passage of the contents of a
vessel or cavity in one direction, but stop or retard the
flow in the opposite direction; as, the ileocolic, mitral,
and semilunar valves.
[1913 Webster]
4. (Bot.)
(a) One of the pieces into which a capsule naturally
separates when it bursts.
(b) One of the two similar portions of the shell of a
diatom.
(c) A small portion of certain anthers, which opens like a
trapdoor to allow the pollen to escape, as in the
barberry.
[1913 Webster]
5. (Zool.) One of the pieces or divisions of bivalve or
multivalve shells.
[1913 Webster]
Air valve, Ball valve, Check valve, etc. See under
Air. Ball, Check, etc.
Double-beat valve, a kind of balance valve usually
consisting of a movable, open-ended, turban-shaped shell
provided with two faces of nearly equal diameters, one
above another, which rest upon two corresponding seats
when the valve is closed.
Equilibrium valve.
(a) A balance valve. See under Balance.
(b) A valve for permitting air, steam, water, etc., to
pass into or out of a chamber so as to establish or
maintain equal pressure within and without.
Valve chest (Mach.), a chamber in which a valve works;
especially (Steam Engine), the steam chest; -- called in
England valve box, and valve casing. See {Steam
chest}, under Steam.
Valve face (Mach.), that part of the surface of a valve
which comes in contact with the valve seat.
Valve gear, or Valve motion (Steam Engine), the system of
parts by which motion is given to the valve or valves for
the distribution of steam in the cylinder. For an
illustration of one form of valve gear, see Link motion.
Valve seat. (Mach.)
(a) The fixed surface on which a valve rests or against
which it presses.
(b) A part or piece on which such a surface is formed.
Valve stem (Mach.), a rod attached to a valve, for moving
it.
Valve yoke (Mach.), a strap embracing a slide valve and
connecting it to the valve stem.
[1913 Webster]Equilibrium \E`qui*lib"ri*um\, n.; pl. E. Equilibriums, L.
Equilibria. [L. aequilibrium, fr. aequilibris in
equilibrium, level; aequus equal + libra balance. See
Equal, and Librate.]
1. Equality of weight or force; an equipoise or a state of
rest produced by the mutual counteraction of two or more
forces.
[1913 Webster]
2. A level position; a just poise or balance in respect to an
object, so that it remains firm; equipoise; as, to
preserve the equilibrium of the body.
[1913 Webster]
Health consists in the equilibrium between those two
powers. --Arbuthnot.
[1913 Webster]
3. A balancing of the mind between motives or reasons, with
consequent indecision and doubt.
[1913 Webster]
Equilibrium valve (Steam Engine), a balanced valve. See
under Valve.
[1913 Webster] |
Equivalve
(gcide) | Equivalve \E"qui*valve\, Equivalved \E"qui*valved\, a. [Equi- +
valve.] (Zo["o]l.)
Having the valves equal in size and from, as in most bivalve
shells.
[1913 Webster] |
Equivalved
(gcide) | Equivalve \E"qui*valve\, Equivalved \E"qui*valved\, a. [Equi- +
valve.] (Zo["o]l.)
Having the valves equal in size and from, as in most bivalve
shells.
[1913 Webster] |
Escape valve
(gcide) | Escape \Es*cape"\, n.
1. The act of fleeing from danger, of evading harm, or of
avoiding notice; deliverance from injury or any evil;
flight; as, an escape in battle; a narrow escape; also,
the means of escape; as, a fire escape.
[1913 Webster]
I would hasten my escape from the windy storm. --Ps.
lv. 8.
[1913 Webster]
2. That which escapes attention or restraint; a mistake; an
oversight; also, transgression. [Obs.]
[1913 Webster]
I should have been more accurate, and corrected all
those former escapes. --Burton.
[1913 Webster]
3. A sally. "Thousand escapes of wit." --Shak.
[1913 Webster]
4. (Law) The unlawful permission, by a jailer or other
custodian, of a prisoner's departure from custody.
[1913 Webster]
5. (Bot.) A plant which has escaped from cultivation.
[Webster 1913 Suppl.]
Note: Escape is technically distinguishable from prison
breach, which is the unlawful departure of the prisoner
from custody, escape being the permission of the
departure by the custodian, either by connivance or
negligence. The term escape, however, is applied by
some of the old authorities to a departure from custody
by stratagem, or without force. --Wharton.
[1913 Webster]
5. (Arch.) An apophyge.
[1913 Webster]
6. Leakage or outflow, as of steam or a liquid.
[1913 Webster]
7. (Elec.) Leakage or loss of currents from the conducting
wires, caused by defective insulation.
[1913 Webster]
Escape pipe (Steam Boilers), a pipe for carrying away steam
that escapes through a safety valve.
Escape valve (Steam Engine), a relief valve; a safety
valve. See under Relief, and Safety.
Escape wheel (Horol.), the wheel of an escapement.
[1913 Webster] |
Eustachian valve
(gcide) | Eustachian \Eu*sta"chi*an\, a. [From Eustachi, a learned Italian
physician who died in Rome, 1574.] (Anat.)
(a) Discovered by Eustachius.
(b) Pertaining to the Eustachian tube; as, Eustachian
catheter.
[1913 Webster]
Eustachian catheter, a tubular instrument to be introduced
into the Eustachian tube so as to allow of inflation of
the middle ear through the nose or mouth.
Eustrachian tube (Anat.), a passage from the tympanum of
the ear to the pharynx. See Ear.
Eustachian valve (Anat.), a crescent-shaped fold of the
lining membrane of the heart at the entrance of the vena
cava inferior. It directs the blood towards the left
auricle in the fetus, but is rudimentary and functionless
in the adult.
[1913 Webster] |
Exhaust valve
(gcide) | Exhaust \Ex*haust"\, a. [L. exhaustus, p. p.]
1. Drained; exhausted; having expended or lost its energy.
[1913 Webster]
2. Pertaining to steam, air, gas, etc., that is released from
the cylinder of an engine after having preformed its work.
[1913 Webster]
Exhaust draught, a forced draught produced by drawing air
through a place, as through a furnace, instead of blowing
it through.
Exhaust fan, a fan blower so arranged as to produce an
exhaust draught, or to draw air or gas out of a place, as
out of a room in ventilating it.
Exhaust nozzle, Exhaust orifice (Steam Engine), the blast
orifice or nozzle.
Exhaust pipe (Steam Engine), the pipe that conveys exhaust
steam from the cylinder to the atmosphere or to the
condenser.
Exhaust port (Steam Engine), the opening, in the cylinder
or valve, by which the exhaust steam escapes.
Exhaust purifier (Milling), a machine for sorting grains,
or purifying middlings by an exhaust draught. --Knight.
Exhaust steam (Steam Engine), steam which is allowed to
escape from the cylinder after having been employed to
produce motion of the piston.
Exhaust valve (Steam Engine), a valve that lets exhaust
steam escape out of a cylinder.
[1913 Webster] |
Expansion valve
(gcide) | Expansion \Ex*pan"sion\, n. [L. expansio: cf. F. expansion.]
1. The act of expanding or spreading out; the condition of
being expanded; dilation; enlargement.
[1913 Webster]
2. That which is expanded; expanse; extend surface; as, the
expansion of a sheet or of a lake; the expansion was
formed of metal.
[1913 Webster]
The starred expansion of the skies. --Beattie.
[1913 Webster]
3. Space through which anything is expanded; also, pure
space.
[1913 Webster]
Lost in expansion, void and infinite. --Blackmore.
[1913 Webster]
4. (Economics & Commmerce) an increase in the production of
goods and services over time, and in the volume of
business transactions, generally associated with an
increase in employment and an increase in the money
supply. Opposite of contraction.
Syn: economic expansion. [1913 Webster +PJC]
5. (Math.) The developed result of an indicated operation;
as, the expansion of (a + b)^2 is a^2 + 2ab + b^2.
[1913 Webster]
6. (Steam Engine) The operation of steam in a cylinder after
its communication with the boiler has been cut off, by
which it continues to exert pressure upon the moving
piston.
[1913 Webster]
7. (Nav. Arch.) The enlargement of the ship mathematically
from a model or drawing to the full or building size, in
the process of construction. --Ham. Nav. Encyc.
[1913 Webster]
Note: Expansion is also used adjectively, as in expansion
joint, expansion gear, etc.
[1913 Webster]
8. an enlarged or extended version of something, such as a
writing or discourse; as, the journal article is an
expansion of the lecture she gave.
[PJC]
9. an expansion joint. See below. [Colloq. or jargon]
[PJC]
Expansion curve, a curve the co["o]rdinates of which show
the relation between the pressure and volume of expanding
gas or vapor; esp. (Steam engine), that part of an
indicator diagram which shows the declining pressure of
the steam as it expands in the cylinder.
Expansion gear (Steam Engine). a cut-off gear. See Illust.
of Link motion.
Automatic expansion gear or Automatic cut-off, one that
is regulated by the governor, and varies the supply of
steam to the engine with the demand for power.
Fixed expansion gear, or Fixed cut-off, one that always
operates at the same fixed point of the stroke.
Expansion joint, or Expansion coupling (Mech. & Engin.),
a yielding joint or coupling for so uniting parts of a
machine or structure that expansion, as by heat, is
prevented from causing injurious strains; as:
(a) A slide or set of rollers, at the end of bridge truss,
to support it but allow end play.
(b) A telescopic joint in a steam pipe, to permit one part
of the pipe to slide within the other.
(c) A clamp for holding a locomotive frame to the boiler
while allowing lengthwise motion.
(d) a strip of compressible material placed at intervals
between blocks of poured concrete, as in roads or
sidewalks.
Expansion valve (Steam Engine), a cut-off valve, to shut
off steam from the cylinder before the end of each stroke.
[1913 Webster] |
Flap valve
(gcide) | Flap \Flap\, n. [OE. flappe, flap, blow, bly-flap; cf. D. flap,
and E. flap, v.]
Anything broad and limber that hangs loose, or that is
attached by one side or end and is easily moved; as, the flap
of a garment.
[1913 Webster]
A cartilaginous flap upon the opening of the larynx.
--Sir T.
Browne.
[1913 Webster]
2. A hinged leaf, as of a table or shutter.
[1913 Webster]
3. The motion of anything broad and loose, or a stroke or
sound made with it; as, the flap of a sail or of a wing.
[1913 Webster]
4. pl. (Far.) A disease in the lips of horses.
[1913 Webster]
5. (Aeronautics) a movable part of an airplane wing, used to
increase lift or drag, especially when taking off or
landing. used often in the plural.
[WordNet 1.5]
Flap tile, a tile with a bent up portion, to turn a corner
or catch a drip.
Flap valve (Mech.), a valve which opens and shuts upon one
hinged side; a clack valve.
[1913 Webster] |
Float valve
(gcide) | Float \Float\ (fl[=o]t), n.[OE. flote ship, boat, fleet, AS.
flota ship, fr. fle['o]tan to float; akin to D. vloot fleet,
G. floss raft, Icel. floti float, raft, fleet, Sw. flotta.
[root] 84. See Fleet, v. i., and cf. Flotilla, Flotsam,
Plover.]
1. Anything which floats or rests on the surface of a fluid,
as to sustain weight, or to indicate the height of the
liquid surface, or mark the place of, something.
Specifically:
(a) A mass of timber or boards fastened together, and
conveyed down a stream by the current; a raft.
(b) The hollow, metallic ball of a self-acting faucet,
which floats upon the water in a cistern or boiler.
(c) The cork or quill used in angling, to support the bait
line, and indicate the bite of a fish.
(d) Anything used to buoy up whatever is liable to sink;
an inflated bag or pillow used by persons learning to
swim; a life preserver.
(e) The hollow, metallic ball which floats on the fuel in
the fuel tank of a vehicle to indicate the level of
the fuel surface, and thus the amount of fuel
remaining.
(f) A hollow elongated tank mounted under the wing of a
seaplane which causes the plane to float when resting
on the surface of the water.
[1913 Webster +PJC]
This reform bill . . . had been used as a float
by the conservative ministry. --J. P.
Peters.
[1913 Webster]
2. A float board. See Float board (below).
[1913 Webster]
3. (Tempering) A contrivance for affording a copious stream
of water to the heated surface of an object of large bulk,
as an anvil or die. --Knight.
[1913 Webster]
4. The act of flowing; flux; flow. [Obs.] --Bacon.
[1913 Webster]
5. A quantity of earth, eighteen feet square and one foot
deep. [Obs.] --Mortimer.
[1913 Webster]
6. (Plastering) The trowel or tool with which the floated
coat of plastering is leveled and smoothed.
[1913 Webster]
7. A polishing block used in marble working; a runner.
--Knight.
[1913 Webster]
8. A single-cut file for smoothing; a tool used by shoemakers
for rasping off pegs inside a shoe.
[1913 Webster]
9. A coal cart. [Eng.] --Simmonds.
[1913 Webster]
10. The sea; a wave. See Flote, n.
[1913 Webster]
11. (Banking) The free use of money for a time between
occurrence of a transaction (such as depositing a check
or a purchase made using a credit card), and the time
when funds are withdrawn to cover the transaction; also,
the money made available between transactions in that
manner.
[PJC]
12. a vehicle on which an exhibit or display is mounted,
driven or pulled as part of a parade. The float often is
based on a large flat platform, and may contain a very
elaborate structure with a tableau or people.
[PJC]
Float board, one of the boards fixed radially to the rim of
an undershot water wheel or of a steamer's paddle wheel;
-- a vane.
Float case (Naut.), a caisson used for lifting a ship.
Float copper or Float gold (Mining), fine particles of
metallic copper or of gold suspended in water, and thus
liable to be lost.
Float ore, water-worn particles of ore; fragments of vein
material found on the surface, away from the vein outcrop.
--Raymond.
Float stone (Arch.), a siliceous stone used to rub
stonework or brickwork to a smooth surface.
Float valve, a valve or cock acted upon by a float. See
Float, 1
(b) .
[1913 Webster] |
Foot valve
(gcide) | Foot \Foot\ (f[oo^]t), n.; pl. Feet (f[=e]t). [OE. fot, foot,
pl. fet, feet. AS. f[=o]t, pl. f[=e]t; akin to D. voet, OHG.
fuoz, G. fuss, Icel. f[=o]tr, Sw. fot, Dan. fod, Goth.
f[=o]tus, L. pes, Gr. poy`s, Skr. p[=a]d, Icel. fet step,
pace measure of a foot, feta to step, find one's way.
[root]77, 250. Cf. Antipodes, Cap-a-pie, Expedient,
Fet to fetch, Fetlock, Fetter, Pawn a piece in chess,
Pedal.]
1. (Anat.) The terminal part of the leg of man or an animal;
esp., the part below the ankle or wrist; that part of an
animal upon which it rests when standing, or moves. See
Manus, and Pes.
[1913 Webster]
2. (Zool.) The muscular locomotive organ of a mollusk. It is
a median organ arising from the ventral region of body,
often in the form of a flat disk, as in snails. See
Illust. of Buccinum.
[1913 Webster]
3. That which corresponds to the foot of a man or animal; as,
the foot of a table; the foot of a stocking.
[1913 Webster]
4. The lowest part or base; the ground part; the bottom, as
of a mountain, column, or page; also, the last of a row or
series; the end or extremity, esp. if associated with
inferiority; as, the foot of a hill; the foot of the
procession; the foot of a class; the foot of the bed;; the
foot of the page.
[1913 Webster]
And now at foot
Of heaven's ascent they lift their feet. --Milton.
[1913 Webster]
5. Fundamental principle; basis; plan; -- used only in the
singular.
[1913 Webster]
Answer directly upon the foot of dry reason.
--Berkeley.
[1913 Webster]
6. Recognized condition; rank; footing; -- used only in the
singular. [R.]
[1913 Webster]
As to his being on the foot of a servant. --Walpole.
[1913 Webster]
7. A measure of length equivalent to twelve inches; one third
of a yard. See Yard.
[1913 Webster]
Note: This measure is supposed to be taken from the length of
a man's foot. It differs in length in different
countries. In the United States and in England it is
304.8 millimeters.
[1913 Webster]
8. (Mil.) Soldiers who march and fight on foot; the infantry,
usually designated as the foot, in distinction from the
cavalry. "Both horse and foot." --Milton.
[1913 Webster]
9. (Pros.) A combination of syllables consisting a metrical
element of a verse, the syllables being formerly
distinguished by their quantity or length, but in modern
poetry by the accent.
[1913 Webster]
10. (Naut.) The lower edge of a sail.
[1913 Webster]
Note: Foot is often used adjectively, signifying of or
pertaining to a foot or the feet, or to the base or
lower part. It is also much used as the first of
compounds.
[1913 Webster]
Foot artillery. (Mil.)
(a) Artillery soldiers serving in foot.
(b) Heavy artillery. --Farrow.
Foot bank (Fort.), a raised way within a parapet.
Foot barracks (Mil.), barracks for infantery.
Foot bellows, a bellows worked by a treadle. --Knight.
Foot company (Mil.), a company of infantry. --Milton.
Foot gear, covering for the feet, as stocking, shoes, or
boots.
Foot hammer (Mach.), a small tilt hammer moved by a
treadle.
Foot iron.
(a) The step of a carriage.
(b) A fetter.
Foot jaw. (Zool.) See Maxilliped.
Foot key (Mus.), an organ pedal.
Foot level (Gunnery), a form of level used in giving any
proposed angle of elevation to a piece of ordnance.
--Farrow.
Foot mantle, a long garment to protect the dress in riding;
a riding skirt. [Obs.]
Foot page, an errand boy; an attendant. [Obs.]
Foot passenger, one who passes on foot, as over a road or
bridge.
Foot pavement, a paved way for foot passengers; a footway;
a trottoir.
Foot poet, an inferior poet; a poetaster. [R.] --Dryden.
Foot post.
(a) A letter carrier who travels on foot.
(b) A mail delivery by means of such carriers.
Fot pound, & Foot poundal. (Mech.) See Foot pound and
Foot poundal, in the Vocabulary.
Foot press (Mach.), a cutting, embossing, or printing
press, moved by a treadle.
Foot race, a race run by persons on foot. --Cowper.
Foot rail, a railroad rail, with a wide flat flange on the
lower side.
Foot rot, an ulcer in the feet of sheep; claw sickness.
Foot rule, a rule or measure twelve inches long.
Foot screw, an adjusting screw which forms a foot, and
serves to give a machine or table a level standing on an
uneven place.
Foot secretion. (Zool.) See Sclerobase.
Foot soldier, a soldier who serves on foot.
Foot stick (Printing), a beveled piece of furniture placed
against the foot of the page, to hold the type in place.
Foot stove, a small box, with an iron pan, to hold hot
coals for warming the feet.
Foot tubercle. (Zool.) See Parapodium.
Foot valve (Steam Engine), the valve that opens to the air
pump from the condenser.
Foot vise, a kind of vise the jaws of which are operated by
a treadle.
Foot waling (Naut.), the inside planks or lining of a
vessel over the floor timbers. --Totten.
Foot wall (Mining), the under wall of an inclosed vein.
[1913 Webster]
By foot, or On foot, by walking; as, to pass a stream on
foot.
Cubic foot. See under Cubic.
Foot and mouth disease, a contagious disease (Eczema
epizo["o]tica) of cattle, sheep, swine, etc.,
characterized by the formation of vesicles and ulcers in
the mouth and about the hoofs.
Foot of the fine (Law), the concluding portion of an
acknowledgment in court by which, formerly, the title of
land was conveyed. See Fine of land, under Fine, n.;
also Chirograph. (b).
Square foot. See under Square.
To be on foot, to be in motion, action, or process of
execution.
To keep the foot (Script.), to preserve decorum. "Keep thy
foot when thou goest to the house of God." --Eccl. v. 1.
To put one's foot down, to take a resolute stand; to be
determined. [Colloq.]
To put the best foot foremost, to make a good appearance;
to do one's best. [Colloq.]
To set on foot, to put in motion; to originate; as, to set
on foot a subscription.
To put one on his feet, or set one on his feet, to put
one in a position to go on; to assist to start.
Under foot.
(a) Under the feet; (Fig.) at one's mercy; as, to trample
under foot. --Gibbon.
(b) Below par. [Obs.] "They would be forced to sell . . .
far under foot." --Bacon.
[1913 Webster]Foot valve \Foot valve\ (Mech.)
A suction valve or check valve at the lower end of a pipe;
esp., such a valve in a steam-engine condenser opening to the
air pump.
[Webster 1913 Suppl.] |
Frost valve
(gcide) | Frost \Frost\ (fr[o^]st; 115), n. [OE. frost, forst, AS. forst,
frost. fr. fre['o]san to freeze; akin to D. varst, G., OHG.,
Icel., Dan., & Sw. frost. [root]18. See Freeze, v. i.]
1. The act of freezing; -- applied chiefly to the congelation
of water; congelation of fluids.
[1913 Webster]
2. The state or temperature of the air which occasions
congelation, or the freezing of water; severe cold or
freezing weather.
[1913 Webster]
The third bay comes a frost, a killing frost.
--Shak.
[1913 Webster]
3. Frozen dew; -- called also hoarfrost or white frost.
[1913 Webster]
He scattereth the hoarfrost like ashes. --Ps.
cxlvii. 16.
[1913 Webster]
4. Coldness or insensibility; severity or rigidity of
character. [R.]
[1913 Webster]
It was of those moments of intense feeling when the
frost of the Scottish people melts like a snow
wreath. --Sir W.
Scott.
[1913 Webster]
Black frost, cold so intense as to freeze vegetation and
cause it to turn black, without the formation of
hoarfrost.
Frost bearer (Physics), a philosophical instrument
illustrating the freezing of water in a vacuum; a
cryophorus.
Frost grape (Bot.), an American grape, with very small,
acid berries.
Frost lamp, a lamp placed below the oil tube of an Argand
lamp to keep the oil limpid on cold nights; -- used
especially in lighthouses. --Knight.
Frost nail, a nail with a sharp head driven into a horse's
shoe to keep him from slipping.
Frost smoke, an appearance resembling smoke, caused by
congelation of vapor in the atmosphere in time of severe
cold.
[1913 Webster]
The brig and the ice round her are covered by a
strange black
obscurity: it is the frost smoke of arctic winters.
--Kane.
Frost valve, a valve to drain the portion of a pipe,
hydrant, pump, etc., where water would be liable to
freeze.
Jack Frost, a popular personification of frost.
[1913 Webster] |
Globe valve
(gcide) | Globe \Globe\ (gl[=o]b), n. [L. globus, perh. akin to L. glomus
a ball of yarn, and E. clump, golf: cf. F. globe.]
1. A round or spherical body, solid or hollow; a body whose
surface is in every part equidistant from the center; a
ball; a sphere.
[1913 Webster]
2. Anything which is nearly spherical or globular in shape;
as, the globe of the eye; the globe of a lamp.
[1913 Webster]
3. The earth; the terraqueous ball; -- usually preceded by
the definite article. --Locke.
[1913 Webster]
4. A round model of the world; a spherical representation of
the earth or heavens; as, a terrestrial or celestial
globe; -- called also artificial globe.
[1913 Webster]
5. A body of troops, or of men or animals, drawn up in a
circle; -- a military formation used by the Romans,
answering to the modern infantry square.
[1913 Webster]
Him round
A globe of fiery seraphim inclosed. --Milton.
[1913 Webster]
Globe amaranth (Bot.), a plant of the genus Gomphrena
(G. globosa), bearing round heads of variously colored
flowers, which long retain color when gathered.
Globe animalcule, a small, globular, locomotive organism
(Volvox globator), once throught to be an animal,
afterward supposed to be a colony of microscopic alg[ae].
Globe of compression (Mil.), a kind of mine producing a
wide crater; -- called also overcharged mine.
Globe daisy (Bot.), a plant or flower of the genus
Globularing, common in Europe. The flowers are minute
and form globular heads.
Globe sight, a form of front sight placed on target rifles.
Globe slater (Zool.), an isopod crustacean of the genus
Spheroma.
Globe thistle (Bot.), a thistlelike plant with the flowers
in large globular heads (Cynara Scolymus); also, certain
species of the related genus Echinops.
Globe valve.
(a) A ball valve.
(b) A valve inclosed in a globular chamber. --Knight.
[1913 Webster]
Syn: Globe, Sphere, Orb, Ball.
Usage: Globe denotes a round, and usually a solid body;
sphere is the term applied in astronomy to such a
body, or to the concentric spheres or orbs of the old
astronomers; orb is used, especially in poetry, for
globe or sphere, and also for the pathway of a
heavenly body; ball is applied to the heavenly bodies
concieved of as impelled through space.
[1913 Webster] |
|