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Hexad :: Hexad (n.) An atom whose valence is six, and which can be theoretically combined with, substituted for, or replaced by, six monad atoms or radicals; as, sulphur is a hexad in sulphuric acid. Also used as an adjective..

Ester :: Ester (n.) An ethereal salt, or compound ether, consisting of an organic radical united with the residue of any oxygen acid, organic or inorganic; thus the natural fats are esters of glycerin and the fatty acids, oleic, etc..

Nonacid :: Nonacid (a.) Destitute of acid properties; hence, basic; metallic; positive; -- said of certain atoms and radicals..

Picryl :: Picryl (n.) The hypothetical radical of picric acid, analogous to phenyl..

Mesityl :: Mesityl (n.) A hypothetical radical formerly supposed to exist in mesityl oxide.

Carbide :: Carbide (n.) A binary compound of carbon with some other element or radical, in which the carbon plays the part of a negative; -- formerly termed carburet..

Valeryl :: Valeryl (n.) The hypothetical radical C5H9O, regarded as the essential nucleus of certain valeric acid derivatives..

Eradicative :: Eradicative (n.) A medicine that effects a radical cure.

Triacid :: Triacid (a.) Capable of neutralizing three molecules of a monobasic acid or the equivalent; having three hydrogen atoms which may be acid radicals; -- said of certain bases; thus, glycerin is a triacid base..

Bicarbonate :: Bicarbonate (n.) 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..

Hexdecyl :: Hexdecyl (n.) The essential radical, C16H33, of hecdecane..

Uranyl :: Uranyl (n.) The radical UO2, conveniently regarded as a residue of many uranium compounds..

Diatomic :: Diatomic (a.) Having two replaceable atoms or radicals.

Sulphinic :: Sulphine (n.) Any one of a series of basic compounds which consist essentially of sulphur united with hydrocarbon radicals. In general they are oily or crystalline deliquescent substances having a peculiar odor; as, trimethyl sulphine, (CH3)3S.OH. Cf. Sulphonium..

Diacid :: Diacid (a.) Divalent; -- said of a base or radical as capable of saturating two acid monad radicals or a dibasic acid. Cf. Dibasic, a., and Biacid..

Ultra :: Ultra (n.) One who advocates extreme measures; an ultraist; an extremist; a radical.

Oxide :: Oxide (n.) A binary compound of oxygen with an atom or radical, or a compound which is regarded as binary; as, iron oxide, ethyl oxide, nitrogen oxide, etc..

Equivalent :: Equivalent (n.) A combining unit, whether an atom, a radical, or a molecule; as, in acid salt two or more equivalents of acid unite with one or more equivalents of base..

Regenerate :: Regenerate (v. t.) Hence, to make a radical change for the better in the character or condition of; as, to regenerate society..

Destructive :: Destructive (n.) One who destroys; a radical reformer; a destructionist.

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