| slovo | definícia |
diurnal
(mass) | diurnal
- každodenný |
diurnal
(encz) | diurnal,každodenní adj: Zdeněk Brož |
Diurnal
(gcide) | Diurnal \Di*ur"nal\, n. [Cf. F. diurnal a prayerbook. See
Diurnal, a.]
1. A daybook; a journal. [Obs.] --Tatler.
[1913 Webster]
2. (R. C. Ch.) A small volume containing the daily service
for the "little hours," viz., prime, tierce, sext, nones,
vespers, and compline.
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3. (Zool.) A diurnal bird or insect.
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Diurnal
(gcide) | Diurnal \Di*ur"nal\, a. [L. diurnalis, fr. dies day. See
Deity, and cf. Journal.]
1. Relating to the daytime; belonging to the period of
daylight, distinguished from the night; -- opposed to
nocturnal; as, diurnal heat; diurnal hours.
[1913 Webster]
2. Daily; recurring every day; performed in a day; going
through its changes in a day; constituting the measure of
a day; as, a diurnal fever; a diurnal task; diurnal
aberration, or diurnal parallax; the diurnal revolution of
the earth.
[1913 Webster]
Ere twice the horses of the sun shall bring
Their fiery torcher his diurnal ring. --Shak.
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3. (Bot.) Opening during the day, and closing at night; --
said of flowers or leaves.
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4. (Zool.) Active by day; -- applied especially to the eagles
and hawks among raptorial birds, and to butterflies
(Diurna) among insects.
[1913 Webster]
Diurnal aberration (Anat.), the aberration of light arising
from the effect of the earth's rotation upon the apparent
direction of motion of light.
Diurnal arc, the arc described by the sun during the
daytime or while above the horizon; hence, the arc
described by the moon or a star from rising to setting.
Diurnal circle, the apparent circle described by a
celestial body in consequence of the earth's rotation.
Diurnal motion of the earth, the motion of the earth upon
its axis which is described in twenty-four hours.
Diurnal motion of a heavenly body, that apparent motion of
the heavenly body which is due to the earth's diurnal
motion.
Diurnal parallax. See under Parallax.
Diurnal revolution of a planet, the motion of the planet
upon its own axis which constitutes one complete
revolution.
Syn: See Daily.
[1913 Webster] |
diurnal
(wn) | diurnal
adj 1: of or belonging to or active during the day; "diurnal
animals are active during the day"; "diurnal flowers are
open during the day and closed at night"; "diurnal and
nocturnal offices" [ant: nocturnal]
2: having a daily cycle or occurring every day; "diurnal
rotation of the heavens" |
| | podobné slovo | definícia |
diurnal
(mass) | diurnal
- každodenný |
diurnal
(encz) | diurnal,každodenní adj: Zdeněk Brož |
diurnal parallax
(encz) | diurnal parallax, n: |
diurnal variation
(encz) | diurnal variation, n: |
diurnally
(encz) | diurnally, |
daily diurnal
(gcide) | Cyclic \Cyc"lic\ (s?k"l?k or s?"kl?k), Cyclical \Cyc"lic*al\
(s?k"l?-kal), a. [Cf. F. cycluque, Gr. kykliko`s, fr. ky`klos
See Cycle.]
1. Of or pertaining to a cycle or circle; moving in cycles;
as, cyclical time. --Coleridge.
[1913 Webster]
2. (Chemistry) Having atoms bonded to form a ring structure.
Opposite of acyclic.
Note: Used most commonly in respect to organic compounds.
Note: [Narrower terms: bicyclic; heterocyclic;
homocyclic, isocyclic]
Syn: closed-chain, closed-ring.
[WordNet 1.5]
3. Recurring in cycles[2]; having a pattern that repeats at
approximately equal intervals; periodic. Opposite of
noncyclic.
Note: [Narrower terms: {alternate(prenominal),
alternating(prenominal)}; {alternate(prenominal), every
other(prenominal), every second(prenominal)};
alternating(prenominal), oscillating(prenominal);
biyearly; {circadian exhibiting 24-hour
periodicity)}; circular; daily, diurnal;
fortnightly, biweekly; hourly; {midweek,
midweekly}; seasonal; semestral, semestrial;
semiannual, biannual, biyearly; {semiweekly,
biweekly}; weekly; annual, yearly; biennial;
bimonthly, bimestrial; half-hourly; half-yearly;
monthly; tertian, alternate(prenominal);
triennial]
[WordNet 1.5]
4. Marked by repeated cycles[2].
[WordNet 1.5]
Cyclic chorus, the chorus which performed the songs and
dances of the dithyrambic odes at Athens, dancing round
the altar of Bacchus in a circle.
Cyclic poets, certain epic poets who followed Homer, and
wrote merely on the Trojan war and its heroes; -- so
called because keeping within the circle of a single
subject. Also, any series or coterie of poets writing on
one subject. --Milman.
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Diurnal aberration
(gcide) | Diurnal \Di*ur"nal\, a. [L. diurnalis, fr. dies day. See
Deity, and cf. Journal.]
1. Relating to the daytime; belonging to the period of
daylight, distinguished from the night; -- opposed to
nocturnal; as, diurnal heat; diurnal hours.
[1913 Webster]
2. Daily; recurring every day; performed in a day; going
through its changes in a day; constituting the measure of
a day; as, a diurnal fever; a diurnal task; diurnal
aberration, or diurnal parallax; the diurnal revolution of
the earth.
[1913 Webster]
Ere twice the horses of the sun shall bring
Their fiery torcher his diurnal ring. --Shak.
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3. (Bot.) Opening during the day, and closing at night; --
said of flowers or leaves.
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4. (Zool.) Active by day; -- applied especially to the eagles
and hawks among raptorial birds, and to butterflies
(Diurna) among insects.
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Diurnal aberration (Anat.), the aberration of light arising
from the effect of the earth's rotation upon the apparent
direction of motion of light.
Diurnal arc, the arc described by the sun during the
daytime or while above the horizon; hence, the arc
described by the moon or a star from rising to setting.
Diurnal circle, the apparent circle described by a
celestial body in consequence of the earth's rotation.
Diurnal motion of the earth, the motion of the earth upon
its axis which is described in twenty-four hours.
Diurnal motion of a heavenly body, that apparent motion of
the heavenly body which is due to the earth's diurnal
motion.
Diurnal parallax. See under Parallax.
Diurnal revolution of a planet, the motion of the planet
upon its own axis which constitutes one complete
revolution.
Syn: See Daily.
[1913 Webster]Aberration \Ab`er*ra"tion\, n. [L. aberratio: cf. F. aberration.
See Aberrate.]
1. The act of wandering; deviation, especially from truth or
moral rectitude, from the natural state, or from a type.
"The aberration of youth." --Hall. "Aberrations from
theory." --Burke.
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2. A partial alienation of reason. "Occasional aberrations of
intellect." --Lingard.
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Whims, which at first are the aberrations of a
single brain, pass with heat into epidemic form.
--I. Taylor.
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3. (Astron.) A small periodical change of position in the
stars and other heavenly bodies, due to the combined
effect of the motion of light and the motion of the
observer; called annual aberration, when the observer's
motion is that of the earth in its orbit, and daily or
diurnal aberration, when of the earth on its axis;
amounting when greatest, in the former case, to 20.4'',
and in the latter, to 0.3''. Planetary aberration is
that due to the motion of light and the motion of the
planet relative to the earth.
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4. (Opt.) The convergence to different foci, by a lens or
mirror, of rays of light emanating from one and the same
point, or the deviation of such rays from a single focus;
called spherical aberration, when due to the spherical
form of the lens or mirror, such form giving different
foci for central and marginal rays; and {chromatic
aberration}, when due to different refrangibilities of the
colored rays of the spectrum, those of each color having a
distinct focus.
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5. (Physiol.) The passage of blood or other fluid into parts
not appropriate for it.
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6. (Law) The producing of an unintended effect by the
glancing of an instrument, as when a shot intended for A
glances and strikes B.
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Syn: Insanity; lunacy; madness; derangement; alienation;
mania; dementia; hallucination; illusion; delusion. See
Insanity.
[1913 Webster] |
diurnal aberration
(gcide) | Diurnal \Di*ur"nal\, a. [L. diurnalis, fr. dies day. See
Deity, and cf. Journal.]
1. Relating to the daytime; belonging to the period of
daylight, distinguished from the night; -- opposed to
nocturnal; as, diurnal heat; diurnal hours.
[1913 Webster]
2. Daily; recurring every day; performed in a day; going
through its changes in a day; constituting the measure of
a day; as, a diurnal fever; a diurnal task; diurnal
aberration, or diurnal parallax; the diurnal revolution of
the earth.
[1913 Webster]
Ere twice the horses of the sun shall bring
Their fiery torcher his diurnal ring. --Shak.
[1913 Webster]
3. (Bot.) Opening during the day, and closing at night; --
said of flowers or leaves.
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4. (Zool.) Active by day; -- applied especially to the eagles
and hawks among raptorial birds, and to butterflies
(Diurna) among insects.
[1913 Webster]
Diurnal aberration (Anat.), the aberration of light arising
from the effect of the earth's rotation upon the apparent
direction of motion of light.
Diurnal arc, the arc described by the sun during the
daytime or while above the horizon; hence, the arc
described by the moon or a star from rising to setting.
Diurnal circle, the apparent circle described by a
celestial body in consequence of the earth's rotation.
Diurnal motion of the earth, the motion of the earth upon
its axis which is described in twenty-four hours.
Diurnal motion of a heavenly body, that apparent motion of
the heavenly body which is due to the earth's diurnal
motion.
Diurnal parallax. See under Parallax.
Diurnal revolution of a planet, the motion of the planet
upon its own axis which constitutes one complete
revolution.
Syn: See Daily.
[1913 Webster]Aberration \Ab`er*ra"tion\, n. [L. aberratio: cf. F. aberration.
See Aberrate.]
1. The act of wandering; deviation, especially from truth or
moral rectitude, from the natural state, or from a type.
"The aberration of youth." --Hall. "Aberrations from
theory." --Burke.
[1913 Webster]
2. A partial alienation of reason. "Occasional aberrations of
intellect." --Lingard.
[1913 Webster]
Whims, which at first are the aberrations of a
single brain, pass with heat into epidemic form.
--I. Taylor.
[1913 Webster]
3. (Astron.) A small periodical change of position in the
stars and other heavenly bodies, due to the combined
effect of the motion of light and the motion of the
observer; called annual aberration, when the observer's
motion is that of the earth in its orbit, and daily or
diurnal aberration, when of the earth on its axis;
amounting when greatest, in the former case, to 20.4'',
and in the latter, to 0.3''. Planetary aberration is
that due to the motion of light and the motion of the
planet relative to the earth.
[1913 Webster]
4. (Opt.) The convergence to different foci, by a lens or
mirror, of rays of light emanating from one and the same
point, or the deviation of such rays from a single focus;
called spherical aberration, when due to the spherical
form of the lens or mirror, such form giving different
foci for central and marginal rays; and {chromatic
aberration}, when due to different refrangibilities of the
colored rays of the spectrum, those of each color having a
distinct focus.
[1913 Webster]
5. (Physiol.) The passage of blood or other fluid into parts
not appropriate for it.
[1913 Webster]
6. (Law) The producing of an unintended effect by the
glancing of an instrument, as when a shot intended for A
glances and strikes B.
[1913 Webster]
Syn: Insanity; lunacy; madness; derangement; alienation;
mania; dementia; hallucination; illusion; delusion. See
Insanity.
[1913 Webster] |
Diurnal acceleration of the fixed stars
(gcide) | Acceleration \Ac*cel`er*a"tion\, n. [L. acceleratio: cf. F.
acc['e]l['e]ration.]
The act of accelerating, or the state of being accelerated;
increase of motion or action; as, a falling body moves toward
the earth with an acceleration of velocity; -- opposed to
retardation.
[1913 Webster]
A period of social improvement, or of intellectual
advancement, contains within itself a principle of
acceleration. --I. Taylor.
[1913 Webster] (Astr. & Physics.)
Acceleration of the moon, the increase of the moon's mean
motion in its orbit, in consequence of which its period of
revolution is now shorter than in ancient times.
Acceleration and retardation of the tides. See {Priming
of the tides}, under Priming.
Diurnal acceleration of the fixed stars, the amount by
which their apparent diurnal motion exceeds that of the
sun, in consequence of which they daily come to the
meridian of any place about three minutes fifty-six
seconds of solar time earlier than on the day preceding.
Acceleration of the planets, the increasing velocity of
their motion, in proceeding from the apogee to the perigee
of their orbits.
[1913 Webster] |
Diurnal arc
(gcide) | Diurnal \Di*ur"nal\, a. [L. diurnalis, fr. dies day. See
Deity, and cf. Journal.]
1. Relating to the daytime; belonging to the period of
daylight, distinguished from the night; -- opposed to
nocturnal; as, diurnal heat; diurnal hours.
[1913 Webster]
2. Daily; recurring every day; performed in a day; going
through its changes in a day; constituting the measure of
a day; as, a diurnal fever; a diurnal task; diurnal
aberration, or diurnal parallax; the diurnal revolution of
the earth.
[1913 Webster]
Ere twice the horses of the sun shall bring
Their fiery torcher his diurnal ring. --Shak.
[1913 Webster]
3. (Bot.) Opening during the day, and closing at night; --
said of flowers or leaves.
[1913 Webster]
4. (Zool.) Active by day; -- applied especially to the eagles
and hawks among raptorial birds, and to butterflies
(Diurna) among insects.
[1913 Webster]
Diurnal aberration (Anat.), the aberration of light arising
from the effect of the earth's rotation upon the apparent
direction of motion of light.
Diurnal arc, the arc described by the sun during the
daytime or while above the horizon; hence, the arc
described by the moon or a star from rising to setting.
Diurnal circle, the apparent circle described by a
celestial body in consequence of the earth's rotation.
Diurnal motion of the earth, the motion of the earth upon
its axis which is described in twenty-four hours.
Diurnal motion of a heavenly body, that apparent motion of
the heavenly body which is due to the earth's diurnal
motion.
Diurnal parallax. See under Parallax.
Diurnal revolution of a planet, the motion of the planet
upon its own axis which constitutes one complete
revolution.
Syn: See Daily.
[1913 Webster] |
Diurnal circle
(gcide) | Diurnal \Di*ur"nal\, a. [L. diurnalis, fr. dies day. See
Deity, and cf. Journal.]
1. Relating to the daytime; belonging to the period of
daylight, distinguished from the night; -- opposed to
nocturnal; as, diurnal heat; diurnal hours.
[1913 Webster]
2. Daily; recurring every day; performed in a day; going
through its changes in a day; constituting the measure of
a day; as, a diurnal fever; a diurnal task; diurnal
aberration, or diurnal parallax; the diurnal revolution of
the earth.
[1913 Webster]
Ere twice the horses of the sun shall bring
Their fiery torcher his diurnal ring. --Shak.
[1913 Webster]
3. (Bot.) Opening during the day, and closing at night; --
said of flowers or leaves.
[1913 Webster]
4. (Zool.) Active by day; -- applied especially to the eagles
and hawks among raptorial birds, and to butterflies
(Diurna) among insects.
[1913 Webster]
Diurnal aberration (Anat.), the aberration of light arising
from the effect of the earth's rotation upon the apparent
direction of motion of light.
Diurnal arc, the arc described by the sun during the
daytime or while above the horizon; hence, the arc
described by the moon or a star from rising to setting.
Diurnal circle, the apparent circle described by a
celestial body in consequence of the earth's rotation.
Diurnal motion of the earth, the motion of the earth upon
its axis which is described in twenty-four hours.
Diurnal motion of a heavenly body, that apparent motion of
the heavenly body which is due to the earth's diurnal
motion.
Diurnal parallax. See under Parallax.
Diurnal revolution of a planet, the motion of the planet
upon its own axis which constitutes one complete
revolution.
Syn: See Daily.
[1913 Webster]Circle \Cir"cle\ (s[~e]r"k'l), n. [OE. cercle, F. cercle, fr. L.
circulus (Whence also AS. circul), dim. of circus circle,
akin to Gr. kri`kos, ki`rkos, circle, ring. Cf. Circus,
Circum-.]
[1913 Webster]
1. A plane figure, bounded by a single curve line called its
circumference, every part of which is equally distant from
a point within it, called the center.
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2. The line that bounds such a figure; a circumference; a
ring.
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3. (Astron.) An instrument of observation, the graduated limb
of which consists of an entire circle.
[1913 Webster]
Note: When it is fixed to a wall in an observatory, it is
called a mural circle; when mounted with a telescope
on an axis and in Y's, in the plane of the meridian, a
meridian circle or transit circle; when involving
the principle of reflection, like the sextant, a
reflecting circle; and when that of repeating an
angle several times continuously along the graduated
limb, a repeating circle.
[1913 Webster]
4. A round body; a sphere; an orb.
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It is he that sitteth upon the circle of the earth.
--Is. xi. 22.
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5. Compass; circuit; inclosure.
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In the circle of this forest. --Shak.
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6. A company assembled, or conceived to assemble, about a
central point of interest, or bound by a common tie; a
class or division of society; a coterie; a set.
[1913 Webster]
As his name gradually became known, the circle of
his acquaintance widened. --Macaulay.
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7. A circular group of persons; a ring.
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8. A series ending where it begins, and repeating itself.
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Thus in a circle runs the peasant's pain. --Dryden.
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9. (Logic) A form of argument in which two or more unproved
statements are used to prove each other; inconclusive
reasoning.
[1913 Webster]
That heavy bodies descend by gravity; and, again,
that gravity is a quality whereby a heavy body
descends, is an impertinent circle and teaches
nothing. --Glanvill.
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10. Indirect form of words; circumlocution. [R.]
[1913 Webster]
Has he given the lie,
In circle, or oblique, or semicircle. --J.
Fletcher.
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11. A territorial division or district.
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Note:
The Circles of the Holy Roman Empire, ten in number, were
those principalities or provinces which had seats in the
German Diet.
[1913 Webster]
Azimuth circle. See under Azimuth.
Circle of altitude (Astron.), a circle parallel to the
horizon, having its pole in the zenith; an almucantar.
Circle of curvature. See Osculating circle of a curve
(Below).
Circle of declination. See under Declination.
Circle of latitude.
(a) (Astron.) A great circle perpendicular to the plane
of the ecliptic, passing through its poles.
(b) (Spherical Projection) A small circle of the sphere
whose plane is perpendicular to the axis.
Circles of longitude, lesser circles parallel to the
ecliptic, diminishing as they recede from it.
Circle of perpetual apparition, at any given place, the
boundary of that space around the elevated pole, within
which the stars never set. Its distance from the pole is
equal to the latitude of the place.
Circle of perpetual occultation, at any given place, the
boundary of the space around the depressed pole, within
which the stars never rise.
Circle of the sphere, a circle upon the surface of the
sphere, called a great circle when its plane passes
through the center of the sphere; in all other cases, a
small circle.
Diurnal circle. See under Diurnal.
Dress circle, a gallery in a theater, generally the one
containing the prominent and more expensive seats.
Druidical circles (Eng. Antiq.), a popular name for certain
ancient inclosures formed by rude stones circularly
arranged, as at Stonehenge, near Salisbury.
Family circle, a gallery in a theater, usually one
containing inexpensive seats.
Horary circles (Dialing), the lines on dials which show the
hours.
Osculating circle of a curve (Geom.), the circle which
touches the curve at some point in the curve, and close to
the point more nearly coincides with the curve than any
other circle. This circle is used as a measure of the
curvature of the curve at the point, and hence is called
circle of curvature.
Pitch circle. See under Pitch.
Vertical circle, an azimuth circle.
Voltaic circuit or Voltaic circle. See under Circuit.
To square the circle. See under Square.
Syn: Ring; circlet; compass; circuit; inclosure.
[1913 Webster] |
Diurnal motion of a heavenly body
(gcide) | Diurnal \Di*ur"nal\, a. [L. diurnalis, fr. dies day. See
Deity, and cf. Journal.]
1. Relating to the daytime; belonging to the period of
daylight, distinguished from the night; -- opposed to
nocturnal; as, diurnal heat; diurnal hours.
[1913 Webster]
2. Daily; recurring every day; performed in a day; going
through its changes in a day; constituting the measure of
a day; as, a diurnal fever; a diurnal task; diurnal
aberration, or diurnal parallax; the diurnal revolution of
the earth.
[1913 Webster]
Ere twice the horses of the sun shall bring
Their fiery torcher his diurnal ring. --Shak.
[1913 Webster]
3. (Bot.) Opening during the day, and closing at night; --
said of flowers or leaves.
[1913 Webster]
4. (Zool.) Active by day; -- applied especially to the eagles
and hawks among raptorial birds, and to butterflies
(Diurna) among insects.
[1913 Webster]
Diurnal aberration (Anat.), the aberration of light arising
from the effect of the earth's rotation upon the apparent
direction of motion of light.
Diurnal arc, the arc described by the sun during the
daytime or while above the horizon; hence, the arc
described by the moon or a star from rising to setting.
Diurnal circle, the apparent circle described by a
celestial body in consequence of the earth's rotation.
Diurnal motion of the earth, the motion of the earth upon
its axis which is described in twenty-four hours.
Diurnal motion of a heavenly body, that apparent motion of
the heavenly body which is due to the earth's diurnal
motion.
Diurnal parallax. See under Parallax.
Diurnal revolution of a planet, the motion of the planet
upon its own axis which constitutes one complete
revolution.
Syn: See Daily.
[1913 Webster] |
Diurnal motion of the earth
(gcide) | Diurnal \Di*ur"nal\, a. [L. diurnalis, fr. dies day. See
Deity, and cf. Journal.]
1. Relating to the daytime; belonging to the period of
daylight, distinguished from the night; -- opposed to
nocturnal; as, diurnal heat; diurnal hours.
[1913 Webster]
2. Daily; recurring every day; performed in a day; going
through its changes in a day; constituting the measure of
a day; as, a diurnal fever; a diurnal task; diurnal
aberration, or diurnal parallax; the diurnal revolution of
the earth.
[1913 Webster]
Ere twice the horses of the sun shall bring
Their fiery torcher his diurnal ring. --Shak.
[1913 Webster]
3. (Bot.) Opening during the day, and closing at night; --
said of flowers or leaves.
[1913 Webster]
4. (Zool.) Active by day; -- applied especially to the eagles
and hawks among raptorial birds, and to butterflies
(Diurna) among insects.
[1913 Webster]
Diurnal aberration (Anat.), the aberration of light arising
from the effect of the earth's rotation upon the apparent
direction of motion of light.
Diurnal arc, the arc described by the sun during the
daytime or while above the horizon; hence, the arc
described by the moon or a star from rising to setting.
Diurnal circle, the apparent circle described by a
celestial body in consequence of the earth's rotation.
Diurnal motion of the earth, the motion of the earth upon
its axis which is described in twenty-four hours.
Diurnal motion of a heavenly body, that apparent motion of
the heavenly body which is due to the earth's diurnal
motion.
Diurnal parallax. See under Parallax.
Diurnal revolution of a planet, the motion of the planet
upon its own axis which constitutes one complete
revolution.
Syn: See Daily.
[1913 Webster] |
Diurnal parallax
(gcide) | Parallax \Par"al*lax\, n. [Gr. ? alternation, the mutual
inclination of two lines forming an angle, fr. ? to change a
little, go aside, deviate; para` beside, beyond + ? to
change: cf. F. parallaxe. Cf. Parallel.]
1. The apparent displacement, or difference of position, of
an object, as seen from two different stations, or points
of view.
[1913 Webster]
2. (Astron.) The apparent difference in position of a body
(as the sun, or a star) as seen from some point on the
earth's surface, and as seen from some other conventional
point, as the earth's center or the sun.
[1913 Webster]
3. (Astron.) The annual parallax. See annual parallax,
below.
[PJC]
Annual parallax, the greatest value of the heliocentric
parallax, or the greatest annual apparent change of place
of a body as seen from the earth and sun; it is equivalent
to the parallax of an astronomical object which would be
observed by taking observations of the object at two
different points one astronomical unit (the distance of
the Earth from the sun) apart, if the line joining the two
observing points is perpendicular to the direction to the
observed object; as, the annual parallax of a fixed star.
The distance of an astronomical object from the Earth is
inversely proportional to the annual parallax. A star
which has an annual parallax of one second of an arc is
considered to be one parsec (3.26 light years) distant
from the earth; a star with an annual parallax of
one-hundredth second of an arc is 326 light years distant.
See parsec in the vocabulary, and stellar parallax,
below.
Binocular parallax, the apparent difference in position of
an object as seen separately by one eye, and then by the
other, the head remaining unmoved.
Diurnal parallax or Geocentric parallax, the parallax of
a body with reference to the earth's center. This is the
kind of parallax that is generally understood when the
term is used without qualification.
Heliocentric parallax, the parallax of a body with
reference to the sun, or the angle subtended at the body
by lines drawn from it to the earth and sun; as, the
heliocentric parallax of a planet.
Horizontal parallax, the geocentric parallx of a heavenly
body when in the horizon, or the angle subtended at the
body by the earth's radius.
Optical parallax, the apparent displacement in position
undergone by an object when viewed by either eye singly.
--Brande & C.
Parallax of the cross wires (of an optical instrument),
their apparent displacement when the eye changes its
position, caused by their not being exactly in the focus
of the object glass.
Stellar parallax, the annual parallax of a fixed star.
[1913 Webster]Diurnal \Di*ur"nal\, a. [L. diurnalis, fr. dies day. See
Deity, and cf. Journal.]
1. Relating to the daytime; belonging to the period of
daylight, distinguished from the night; -- opposed to
nocturnal; as, diurnal heat; diurnal hours.
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2. Daily; recurring every day; performed in a day; going
through its changes in a day; constituting the measure of
a day; as, a diurnal fever; a diurnal task; diurnal
aberration, or diurnal parallax; the diurnal revolution of
the earth.
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Ere twice the horses of the sun shall bring
Their fiery torcher his diurnal ring. --Shak.
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3. (Bot.) Opening during the day, and closing at night; --
said of flowers or leaves.
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4. (Zool.) Active by day; -- applied especially to the eagles
and hawks among raptorial birds, and to butterflies
(Diurna) among insects.
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Diurnal aberration (Anat.), the aberration of light arising
from the effect of the earth's rotation upon the apparent
direction of motion of light.
Diurnal arc, the arc described by the sun during the
daytime or while above the horizon; hence, the arc
described by the moon or a star from rising to setting.
Diurnal circle, the apparent circle described by a
celestial body in consequence of the earth's rotation.
Diurnal motion of the earth, the motion of the earth upon
its axis which is described in twenty-four hours.
Diurnal motion of a heavenly body, that apparent motion of
the heavenly body which is due to the earth's diurnal
motion.
Diurnal parallax. See under Parallax.
Diurnal revolution of a planet, the motion of the planet
upon its own axis which constitutes one complete
revolution.
Syn: See Daily.
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Diurnal revolution of a planet
(gcide) | Diurnal \Di*ur"nal\, a. [L. diurnalis, fr. dies day. See
Deity, and cf. Journal.]
1. Relating to the daytime; belonging to the period of
daylight, distinguished from the night; -- opposed to
nocturnal; as, diurnal heat; diurnal hours.
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2. Daily; recurring every day; performed in a day; going
through its changes in a day; constituting the measure of
a day; as, a diurnal fever; a diurnal task; diurnal
aberration, or diurnal parallax; the diurnal revolution of
the earth.
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Ere twice the horses of the sun shall bring
Their fiery torcher his diurnal ring. --Shak.
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3. (Bot.) Opening during the day, and closing at night; --
said of flowers or leaves.
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4. (Zool.) Active by day; -- applied especially to the eagles
and hawks among raptorial birds, and to butterflies
(Diurna) among insects.
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Diurnal aberration (Anat.), the aberration of light arising
from the effect of the earth's rotation upon the apparent
direction of motion of light.
Diurnal arc, the arc described by the sun during the
daytime or while above the horizon; hence, the arc
described by the moon or a star from rising to setting.
Diurnal circle, the apparent circle described by a
celestial body in consequence of the earth's rotation.
Diurnal motion of the earth, the motion of the earth upon
its axis which is described in twenty-four hours.
Diurnal motion of a heavenly body, that apparent motion of
the heavenly body which is due to the earth's diurnal
motion.
Diurnal parallax. See under Parallax.
Diurnal revolution of a planet, the motion of the planet
upon its own axis which constitutes one complete
revolution.
Syn: See Daily.
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Diurnalist
(gcide) | Diurnalist \Di*ur"nal*ist\, n.
A journalist. [Obs.] --Bp. Hall.
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Diurnally
(gcide) | Diurnally \Di*ur"nal*ly\, adv.
Daily; every day.
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Diurnalness
(gcide) | Diurnalness \Di*ur"nal*ness\, n.
The quality of being diurnal.
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Equidiurnal
(gcide) | Equidiurnal \E`qui*di*ur"nal\, a. [Equi- + diurnal.]
Pertaining to the time of equal day and night; -- applied to
the equinoctial line. --Whewell.
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Semidiurnal
(gcide) | Semidiurnal \Sem`i*di*ur"nal\, a.
1. Pertaining to, or accomplished in, half a day, or twelve
hours; occurring twice every day.
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2. Pertaining to, or traversed in, six hours, or in half the
time between the rising and setting of a heavenly body;
as, a semidiurnal arc.
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diurnal
(wn) | diurnal
adj 1: of or belonging to or active during the day; "diurnal
animals are active during the day"; "diurnal flowers are
open during the day and closed at night"; "diurnal and
nocturnal offices" [ant: nocturnal]
2: having a daily cycle or occurring every day; "diurnal
rotation of the heavens" |
diurnal parallax
(wn) | diurnal parallax
n 1: the parallax of a celestial body using two points on the
surface of the earth as the earth rotates [syn: {geocentric
parallax}, diurnal parallax] |
diurnal variation
(wn) | diurnal variation
n 1: fluctuations that occur during each day |
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