| slovo | definícia |
C2H4
(gcide) | Ethylidene \E*thyl"i*dene\ (Chem.)
An unsymmetrical, divalent, hydrocarbon radical, C2H4
metameric with ethylene but written thus, CH3.CH= to
distinguish it from the symmetrical ethylene, CH2=CH2. Its
compounds are derived from aldehyde. Formerly called also
ethidene.
[1913 Webster] |
C2H4
(gcide) | Ethylene \Eth"yl*ene\ ([e^]th"[i^]l*[=e]n), n. [From Ethyl.]
(Chem.)
A colorless, gaseous hydrocarbon, C2H4, forming an
important ingredient of illuminating gas, and also obtained
by the action of concentrated sulphuric acid in alcohol. It
is an unsaturated compound and combines directly with
chlorine and bromine to form oily liquids (Dutch liquid), --
hence called olefiant gas. Called also ethene, elayl,
and formerly, bicarbureted hydrogen.
[1913 Webster]
Ethylene series (Chem.), the series of unsaturated
hydrocarbons of which ethylene is the type, and
represented by the general formula CnH2n.
[1913 Webster] |
| | podobné slovo | definícia |
C2H4Cl2
(gcide) | Dutch \Dutch\, a. [D. duitsch German; or G. deutsch, orig.,
popular, national, OD. dietsc, MHG. diutsch, tiutsch, OHG.
diutisk, fr. diot, diota, a people, a nation; akin to AS.
pe['o]d, OS. thiod, thioda, Goth. piuda; cf. Lith. tauta
land, OIr. tuath people, Oscan touto. The English have
applied the name especially to the Germanic people living
nearest them, the Hollanders. Cf. Derrick, Teutonic.]
Pertaining to Holland, or to its inhabitants.
[1913 Webster]
Dutch auction. See under Auction.
Dutch cheese, a small, pound, hard cheese, made from skim
milk.
Dutch clinker, a kind of brick made in Holland. It is
yellowish, very hard, and long and narrow in shape.
Dutch clover (Bot.), common white clover ({Trifolium
repens}), the seed of which was largely imported into
England from Holland.
Dutch concert, a so-called concert in which all the singers
sing at the same time different songs. [Slang]
Dutch courage, the courage of partial intoxication. [Slang]
--Marryat.
Dutch door, a door divided into two parts, horizontally, so
arranged that the lower part can be shut and fastened,
while the upper part remains open.
Dutch foil, Dutch leaf, or Dutch gold, a kind of brass
rich in copper, rolled or beaten into thin sheets, used in
Holland to ornament toys and paper; -- called also {Dutch
mineral}, Dutch metal, brass foil, and bronze leaf.
Dutch liquid (Chem.), a thin, colorless, volatile liquid,
C2H4Cl2, of a sweetish taste and a pleasant ethereal
odor, produced by the union of chlorine and ethylene or
olefiant gas; -- called also Dutch oil. It is so called
because discovered (in 1795) by an association of four
Hollandish chemists. See Ethylene, and Olefiant.
Dutch oven, a tin screen for baking before an open fire or
kitchen range; also, in the United States, a shallow iron
kettle for baking, with a cover to hold burning coals.
Dutch pink, chalk, or whiting dyed yellow, and used in
distemper, and for paper staining. etc. --Weale.
Dutch rush (Bot.), a species of horsetail rush or
Equisetum (Equisetum hyemale) having a rough,
siliceous surface, and used for scouring and polishing; --
called also scouring rush, and shave grass. See
Equisetum.
Dutch tile, a glazed and painted ornamental tile, formerly
much exported, and used in the jambs of chimneys and the
like.
[1913 Webster]
Note: Dutch was formerly used for German.
[1913 Webster]
Germany is slandered to have sent none to this
war [the Crusades] at this first voyage; and that
other pilgrims, passing through that country,
were mocked by the Dutch, and called fools for
their pains. --Fuller.
[1913 Webster] |
C2H4CO2NH
(gcide) | Succinimide \Suc`cin*im"ide\, n. (Chem.)
A white crystalline nitrogenous substance, C2H4.(CO)2.NH,
obtained by treating succinic anhydride with ammonia gas. It
is a typical imido acid, and forms a series of salts. See
Imido acid, under Imido.
[1913 Webster] |
C2H4N4
(gcide) | Param \Par"am\, n. (Chem.)
A white crystalline nitrogenous substance (C2H4N4); --
called also dicyandiamide.
[1913 Webster] |
C2H4NH2
(gcide) | Piperazine \Pi*per"a*zine\, n. Also -zin \-zin\ . [Piperidine +
azote + -ine.] (Chem.)
A crystalline substance, (C2H4NH)2, formed by action of
ammonia on ethylene bromide, by reduction of pyrazine, etc.
It is a strong base, and is used as a remedy for gout.
[Webster 1913 Suppl.] |
C2H4NH22
(gcide) | Diamine \Di*am"ine\ (?; 104), n. [Pref. di- + amine.] (Chem.)
A compound containing two amido groups united with one or
more basic or positive radicals, -- as contrasted with a
diamide.
[1913 Webster]
Note: In chemical nomenclature, if any amine or diamine is
named by prefixing the nitrogen group, the name of the
latter takes the form of amido, diamido, etc., thus
ethylene diamine, C2H4.(NH2)2, is also called
diamido-ethylene.
[1913 Webster] |
C2H4O
(gcide) | Aldehyde \Al"de*hyde\ ([a^]l"d[-e]*h[imac]d), n. [Abbrev. fr.
alcohol dehydrogenatum, alcohol deprived of its hydrogen.]
1. (Chem.) A colorless, mobile, and very volatile liquid
obtained from alcohol by certain processes of oxidation.
[1913 Webster]
2. (Chem.) Any compound having the group -CHO. Methyl
aldehyde, the simplest aldehyde, is more commonly called
formaldehyde, H-CHO, and acetic aldehyde is now more
commonly called acetaldehyde. The higher aldehydes may
be solids. A reducing sugar typically contains the
aldehyde group.
[PJC]
Note: The aldehydes are intermediate between the alcohols and
acids, and differ from the alcohols in having two less
hydrogen atoms in the molecule, as common aldehyde
(called also acetaldehyde, acetic aldehyde or
ethyl aldehyde), C2H4O; methyl aldehyde (called
also formaldehyde), CH2O.
[1913 Webster +PJC]
Aldehyde ammonia (Chem.), a compound formed by the union of
aldehyde with ammonia.
[1913 Webster] |
C2H4O2
(gcide) | Formula \For"mu*la\, n.; pl. E. Formulas, L. Formul[ae].
[L., dim. of forma form, model. SeeForm, n.]
1. A prescribed or set form; an established rule; a fixed or
conventional method in which anything is to be done,
arranged, or said.
[1913 Webster]
2. (Eccl.) A written confession of faith; a formal statement
of foctrines.
[1913 Webster]
3. (Math.) A rule or principle expressed in algebraic
language; as, the binominal formula.
[1913 Webster]
4. (Med.) A prescription or recipe for the preparation of a
medicinal compound.
[1913 Webster]
5. (Chem.) A symbolic expression (by means of letters,
figures, etc.) of the constituents or constitution of a
compound.
[1913 Webster]
Note: Chemical formul[ae] consist of the abbreviations of the
names of the elements, with a small figure at the lower
right hand, to denote the number of atoms of each
element contained.
[1913 Webster]
Empirical formula (Chem.), an expression which gives the
simple proportion of the constituents; as, the empirical
formula of acetic acid is C2H4O2.
Graphic formula, Rational formula (Chem.), an expression
of the constitution, and in a limited sense of the
structure, of a compound, by the grouping of its atoms or
radicals; as, a rational formula of acetic acid is
CH3.(C:O).OH; -- called also structural formula,
constitutional formula, etc. See also the formula of
Benzene nucleus, under Benzene.
Molecular formula (Chem.), a formula indicating the
supposed molecular constitution of a compound.
[1913 Webster] |
C2H4OH2
(gcide) | Glycol \Gly"col\, n. [Glycerin + -ol. See Glycerin.] (Chem.)
(a) A thick, colorless liquid, C2H4(OH)2, of a sweetish
taste, produced artificially from certain ethylene
compounds. It is a diacid alcohol, intermediate between
ordinary ethyl alcohol and glycerin.
[1913 Webster] |
HOC2H4SO3H
(gcide) | Isethionic \I*seth`i*on"ic\, a. [Is- + ethionic.] (Chem.)
Pertaining to, derived from, or designating, an acid,
HO.C2H4.SO3H, obtained as an oily or crystalline substance,
by the action of sulphur trioxide on alcohol or ether. It is
derivative of sulphuric acid.
[1913 Webster] |
|