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

Radicality :: Radicality (n.) Radicalness; relation to a root in essential nature or principle.

Xylylene :: Xylylene (n.) Any one of three metameric radicals, CH2.C6H4.CH2, derived respectively from the three xylenes. Often used adjectively; as, xylylene alcohol..

Triatomic :: Triatomic (a.) Having three atoms; -- said of certain elements or radicals.

Pentad :: Pentad (n.) Any element, atom, or radical, having a valence of five, or which can be combined with, substituted for, or compared with, five atoms of hydrogen or other monad; as, nitrogen is a pentad in the ammonium compounds..

Hexyl :: Hexyl (n.) A compound radical, C6H13, regarded as the essential residue of hexane, and a related series of compounds..

Conservative :: Conservative (a.) Of or pertaining to a political party which favors the conservation of existing institutions and forms of government, as the Conservative party in England; -- contradistinguished from Liberal and Radical..

Radical :: Radical (a.) Proceeding from a rootlike stem, or one which does not rise above the ground; as, the radical leaves of the dandelion and the sidesaddle flower..

Phthalyl :: Phthalyl (n.) The hypothetical radical of phthalic acid.

Conservative :: Conservative (n.) One who, or that which, preserves from ruin, injury, innovation, or radical change; a preserver; a conserver..

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

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..

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..

Mercurammonium :: Mercurammonium (n.) A radical regarded as derived from ammonium by the substitution of mercury for a portion of the hydrogen.

Nitro- :: Nitro- () A combining form (used also adjectively) designating certain compounds of nitrogen or of its acids, as nitrohydrochloric, nitrocalcite; also, designating the group or radical NO2, or its compounds, as nitrobenzene..

Quadrivalent :: Quadrivalent (a.) Having a valence of four; capable of combining with, being replaced by, or compared with, four monad atoms; tetravalent; -- said of certain atoms and radicals; thus, carbon and silicon are quadrivalent elements..

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

Carboxide :: Carboxide (n.) A compound of carbon and oxygen, as carbonyl, with some element or radical; as, potassium carboxide..

Octavalent :: Octavalent (a.) Having a valence of eight; capable of being combined with, exchanged for, or compared with, eight atoms of hydrogen; -- said of certain atoms or radicals..

Sporadically :: Sporadical (a.) Sporadic.

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