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taining, or derived from, amidogen. Amido acid, an acid in which a portion of the nonacid hydrogen has been replaced by the amido group. The amido acids are both basic and acid. -- Amido group, amidogen, NH2.

a separate state, which may be regarded as ammonia from the molecule of which one of its hydrogen atoms has been removed; -- called also the amido group, and in composition represented by the form amido.

f a class of strongly basic substances derived from ammonia by replacement of one or more hydrogen atoms by a basic atom or radical.

A gaseous compound of hydrogen and nitrogen, NH3, with a pungent smell and taste: -- often called volatile alkali, and spirits of hartshorn.

One of a class of compounds which may be regarded as amides in which more or less of the hydrogen has been replaced by phenyl.

An organic base belonging to the phenylamines. It may be regarded as ammonia in which one hydrogen atom has been replaced by the radical phenyl. It is a colorless, oily liquid, originally obtained from indigo by distillation, but now largely manufactured from coal tar or nitrobenzene as a base from which many brilliant…

Combined with or containing antimony; as, antimoniureted hydrogen. [Written also antimoniuretted.]

A compound formerly supposed to be modification of oxygen, but now known to be hydrogen dioxide; -- so called because apparently antagonistic to ozone, converting it into ordinary oxygen.

Combined with arsenic; -- said some elementary substances or radicals; as, arseniureted hydrogen. [Also spelt arseniuretted.]

A compound of arsenic and hydrogen, AsH3, a colorless and exceedingly poisonous gas, having and odor like garlic; arseniureted hydrogen.

ht of the air at the sea level, on a unit of surface, or about 14.7 Ibs. to the sq. inch. Hydrogen was liquefied under a pressure of 650 atmospheres. Lubbock.

(Chem.), the weight of the atom of an element as compared with the weight of the atom of hydrogen, taken as a standard.

A bag made of silk or other light material, and filled with hydrogen gas or heated air, so as to rise and float in the atmosphere; especially, one with a car attached for aërial navigation.

ic salt (Chem.), a salt formed from a base or hydroxide by the partial replacement of its hydrogen by a negative or acid element or radical.

ith one or more atoms or equivalents of a base, as indicated by the number of replaceable hydrogen atoms contained in the acid.

nzene ring (Chem.), a closed chain or ring, consisting of six carbon atoms, each with one hydrogen atom attached, regarded as the type from which the aromatic compounds are derived. This ring formula is provisionally accepted as representing the probable constitution of the benzene molecule, C6H6, and as the type on wh…

Having two hydrogen atoms which can be replaced by negative atoms or radicals to form salts; -- said of bases. See Diacid.

Having to hydrogen atoms which can be replaced by positive or basic atoms or radicals to form salts; -- said of acids. See Dibasic.

A carbonate in which but half the hydrogen of the acid is replaced by a positive element or radical, thus making the proportion of the acid to the positive or basic portion twice what it is in the normal carbonates; an acid carbonate; -- sometimes called supercarbonate.

A compound of two atoms of hydrogen with some other substance. [Obs.]