Search the Dictionary

A nitrogenous, organic base, NH2.OH, resembling ammonia, and produced by a modified reduction of nitric acid. It is usually obtained as a volatile, unstable solution in water. It acts as a strong reducing agent.

ds. Hyponitrous acid (Chem.), an unstable nitrogen acid, NOH, whose salts are produced by reduction of the nitrates, although the acid itself is not isolated in the free state except as a solution in water; -- called also nitrosylic acid.

. Hyposulphurous acid. (a) Thiosulphuric acid. [Obs.] (b) An acid, H2SO2, obtained by the reduction of sulphurous acid. It is not obtained in the free state, but in an orange-yellow water solution, which is a strong reducing and bleaching agent. Called also hydrosulphurous acid.

The act of impoverishing, or the state of being impoverished; reduction to poverty. Sir W. Scott.

An incarnate form; a personification; a manifestation; a reduction to apparent from; a striking exemplification in person or act. She is a new incarnation of some of the illustrious dead. Jeffrey. The very incarnation of selfishness. F. W. Robertson.

The quality of being incompressible, or incapable of reduction in volume by pressure; -- formerly supposed to be a property of liquids. The incompressibility of water is not absolute. Rees.

snake (Zoöl.), the gopher snake. -- Indigo white, a white crystalline powder obtained by reduction from indigo blue, and by oxidation easily changed back to it; -- called also indigogen. -- Indigo yellow, a substance obtained from indigo.

nce, C8H7N, obtained from blue indigo, and almost all indigo derivatives, by a process of reduction. It is also formed from albuminous matter, together with skatol, by putrefaction, and by fusion with caustic potash, and is present in human excrement, as well as in the intestinal canal of some herbivora.…

A dark resinous substance, polymeric with indol, and obtained by the reduction of indigo white.

A white crystalline substance obtained by the partial reduction of isatin. [Written also isatyde.]

s the essential residue of a series of compounds, related to isatin, which easily pass by reduction to indigo blue. -- I*sat`o*gen"ic, a.

One of a series of organic bases obtained by the reduction of certain isonitroso compounds of the ketones. In general they are unstable oily substances having a pungent aromatic odor.

d other, organized, with Charles Stewart Parnell as president, in 1879 with a view to the reduction of farm rents and a reconstruction of the land laws. -- Land"*lea`guer (#), n. -- Land"*lea`guism (#), n.

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.