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A colorless, crystalline, organic base, obtained from rosaniline by reduction, and also from other sources. It forms colorless salts.

specif. (Chem.), denoting an extensive series of colorless organic compounds, obtained by reduction from certain other colored compounds; as, leucaniline, leucaurin, etc.

The act of literalizing; reduction to a literal meaning.

An element obtained by reduction of its oxide, as a hard, grayish white metal, fusible with difficulty, but easily oxidized. Its ores occur abundantly in nature as the minerals pyrolusite, manganite, etc. Symbol Mn. Atomic weight 54.8.

A metallic element mostly obtained by reduction from cinnabar, one of its ores. It is a heavy, opaque, glistening liquid (commonly called quicksilver), and is used in barometers, thermometers, ect. Specific gravity 13.6. Symbol Hg (Hydrargyrum). Atomic weight 199.8. Mercury has a molecule which consists of only one ato…

, alternately with sifting and sorting the product. -- Low milling, milling in which the reduction is effected in a single crushing or grinding. -- Milling cutter, a fluted, sharp-edged rotary cutter for dressing surfaces, as of metal, of various shapes. -- Milling machine, a machine tool for dressing surfaces by ro…

A reduction in size near the end of an object, formed by a groove around it; as, a neck forming the journal of a shaft.

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.

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.