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A complex, oily, nitrogenous base, isomeric with nicotine, and obtained by the reduction of certain derivatives of the pyridine group.

Reduction to a standard or normal state.

A white crystalline nitrogenous substance (C6H4N4O5) obtained by the reduction of parabanic acid; -- called also leucoturic acid.

A white crystalline nitrogenous substance (C8H7NO) of the indol group, obtained by the reduction of dioxindol. It is a so-called lactam compound.

A lactone obtained by reduction of phthalyl chloride, as a white crystalline substance; hence, by extension, any one of the series of which phthalide proper is the type. [Written also phthalid.]

A colorless crystalline substance obtained by reduction from phthaleïn, into which it is easily converted by oxidation; hence, any one of the series of which phthalin proper is the type.

A crystalline substance, (C2H4NH)2, formed by action of ammonia on ethylene bromide, by reduction of pyrazine, etc. It is a strong base, and is used as a remedy for gout.

.), a soft, dull black powder, consisting of finely divided metallic platinum obtained by reduction and precipitation from its solutions. It absorbs oxygen to a high degree, and is employed as an oxidizer. -- Platinum lamp (Elec.), a kind of incandescent lamp of which the luminous medium is platinum. See under Incande…

A nitrogenous base, C4H7N, obtained as a colorless liquid by the reduction of pyrrol.

with hydroquinone, or as an intermediate product in the oxidation of hydroquinone or the reduction of quinone. [Written also chinhydrone.]

Reduction to congruence or consistency; removal of inconsistency; harmony. A clear and easy reconciliation of those seeming inconsistencies of Scripture. D. Rogers.

Reduction. Milton.

By reduction; by consequence.

Resisting ordinary treatment; difficult of fusion, reduction, or the like; -- said especially of metals and the like, which do not readily yield to heat, or to the hammer; as, a refractory ore.

ng or preserving the health, or for the purpose of attaining some particular effect, as a reduction of flesh; -- sometimes used synonymously with hygiene.

in a more or less impure state, which forms in the bottom of the crucible in smelting and reduction of ores.

Admitting of being resolved; admitting separation into constituent parts, or reduction to first principles; admitting solution or explanation; as, resolvable compounds; resolvable ideas or difficulties.

The reduction of a metal from a state of combination to its metallic state.

An oily liquid, C6H10O2, obtained by the reduction of saccharin.

th great differentiation of its parts (root, stem, leaves, flowers, etc.); by the extreme reduction of the gametophyte; and by the development of seeds. All the Spermatophyta are heterosporous; fertilization of the egg cell is either through a pollen tube emitted by the microspore or (in a few gymnosperms) by spermatoz…