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Propinyl :: Propinyl (n.) A hydrocarbon radical regarded as an essential residue of propine and allied compounds.

Radical :: Radical (n.) Specifically, a group of two or more atoms, not completely saturated, which are so linked that their union implies certain properties, and are conveniently regarded as playing the part of a single atom; a residue; -- called also a compound radical. Cf. Residue..

Red-hot :: Red-hot (a.) Red with heat; heated to redness; as, red-hot iron; red-hot balls. Hence, figuratively, excited; violent; as, a red-hot radical..

Tolyl :: Tolyl (n.) The hydrocarbon radical, CH3.C6H4, regarded as characteristic of certain compounds of the aromatic series related to toluene; as, tolyl carbinol..

Ammonium :: Ammonium (n.) A compound radical, NH4, having the chemical relations of a strongly basic element like the alkali metals..

Surd :: Surd (a.) Involving surds; not capable of being expressed in rational numbers; radical; irrational; as, a surd expression or quantity; a surd number..

Ether :: Ether (n.) Any similar oxide of hydrocarbon radicals; as, amyl ether; valeric ether..

Nitrosyl :: Nitrosyl (n.) the radical NO, called also the nitroso group. The term is sometimes loosely used to designate certain nitro compounds; as, nitrosyl sulphuric acid. Used also adjectively..

Deutoxide :: Deutoxide (n.) A compound containing in the molecule two atoms of oxygen united with some other element or radical; -- usually called dioxide, or less frequently, binoxide..

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..

Radical :: Radical (n.) A primitive letter; a letter that belongs to the radix.

Radical :: Radical (a.) Of or pertaining to a radix or root; as, a radical quantity; a radical sign. See below..

Antimonite :: Antimonite (n.) A compound of antimonious acid and a base or basic radical.

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

Arseniureted :: Arseniureted (a.) Combined with arsenic; -- said some elementary substances or radicals; as, arseniureted hydrogen..

Thionyl :: Thionyl (n.) The hypothetical radical SO, regarded as an essential constituent of certain sulphurous compounds; as, thionyl chloride..

Tartronyl :: Tartronyl (n.) A hypothetical radical constituting the characteristic residue of tartronic acid and certain of its derivatives.

Heptyl :: Heptyl (n.) A compound radical, C7H15, regarded as the essential radical of heptane and a related series of compounds..

Hemimellitic :: Hemimellitic (a.) Having half as many (three) carboxyl radicals as mellitic acid; -- said of an organic acid.

Glycolyl :: Glycolyl (n.) A divalent, compound radical, CO.CH2, regarded as the essential radical of glycolic acid, and a large series of related compounds..

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