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Thienyl :: Thienyl (n.) The hypothetical radical C4H3S, regarded as the essential residue of thiophene and certain of its derivatives..

Radical :: Radical (a.) A radical vessel. See under Radical, a..

Phosphinic :: Phosphinic (a.) Pertaining to, or designating, certain acids analogous to the phosphonic acids, but containing two hydrocarbon radicals, and derived from the secondary phosphines by oxidation..

Heptavalent :: Heptavalent (a.) Having seven units of attractive force or affinity; -- said of heptad elements or radicals.

Sulphionide :: Sulphion (n.) A hypothetical radical, SO4, regarded as forming the acid or negative constituent of sulphuric acid and the sulphates in electrolytic decomposition; -- so called in accordance with the binary theory of salts..

Sulphonic :: Sulphone (n.) Any one of a series of compounds analogous to the ketones, and consisting of the sulphuryl group united with two hydrocarbon radicals; as, dimethyl sulphone, (CH/)/.SO/..

Substitute :: Substituent (n.) Any atom, group, or radical substituted for another, or entering a molecule in place of some other part which is removed..

Menthyl :: Menthyl (n.) A compound radical forming the base of menthol.

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..

Ceryl :: Ceryl (n.) A radical, C27H55 supposed to exist in several compounds obtained from Chinese wax, beeswax, etc..

Radical :: Radical (n.) A primitive word; a radix, root, or simple, underived, uncompounded word; an etymon..

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

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

Vanadyl :: Vanadyl (n.) The hypothetical radical VO, regarded as a characterized residue of certain vanadium compounds..

Sulphophosphate :: Sulphonium (n.) A hypothetical radical, SH3, regarded as the type and nucleus of the sulphines..

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

Nitride :: Nitride (n.) A binary compound of nitrogen with a more metallic element or radical; as, boric nitride..

Triad :: Triad (n.) An element or radical whose valence is three.

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..

Heptad :: Heptad (n.) An atom which has a valence of seven, and which can be theoretically combined with, substituted for, or replaced by, seven monad atoms or radicals; as, iodine is a heptad in iodic acid. Also used as an adjective..

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