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A white, crystalline substance, 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 som…

Any one of a series of artificial blue dyestuffs, resembling indigo in appearance, and obtained by the action of phenol on certain nitrogenous derivatives of quinone. Simple indophenol proper has not yet been isolated.

Any one of a large series of aniline dyes, colored blue or violet, and represented by aniline violet.

nd the thunders roll down the horizon, will the serene light of God flow upon us, and the blue infinite embrace us again. J. Martineau.

A silicate of alumina, iron, and magnesia, having a bright blue color and vitreous luster; cordierite. It is remarkable for its dichroism, and is also called dichroite.

of light upon; to illuminate; to brighten; to adorn with luster. Thy smile irradiates yon blue fields. Sir W. Jones.

An orange-red crystalline substance, C8H5NO2, obtained by the oxidation of indigo blue. It is also produced from certain derivatives of benzoic acid, and is one important source of artificial indigo. [Written also, less properly, isatine.]

A genus of herbs, some species of which, especially the Isatis tinctoria, yield a blue dye similar to indigo; woad.

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

a jack staff at the bowsprit cap; -- called also union jack. The American jack is a small blue flag, with a star for each State.

ng a waistcoat lined with cork, to serve as a life preserver; -- called also cork jacket. Blue jacket. (Naut.) See under Blue. -- Steam jacket, a space filled with steam between an inner and an outer cylinder, or between a casing and a receptacle, as a kettle. -- To dust one's jacket, to give one a beating. [Colloq.]…

herb of the genus Polemonium (P. coeruleum), having corymbs of drooping flowers, usually blue. Gray. (b) (Naut.) A rope ladder, with wooden steps, for going aloft. R. H. Dana, Jr. (c) (Naut.) A succession of short cracks in a defective spar. -- Jacob's membrane. See Retina. -- Jacob's staff. (a) A name given to many…

of the North Pacific; -- called also Kuro-Siwo, or Black Stream, in allusion to the deep blue of its water. It is similar in may ways to the Gulf Stream.

consequent damming up, in the liver, of the bile, which is then absorbed into the blood. Blue jaundice. See Cyanopathy.

A fish of the genus Leuciscus; the blue chub of the Danube.

European food fish (Zeus faber). Its color is yellow and olive, with golden, silvery, and blue reflections. It has a round dark spot on each side. Called also dory, doree, and St. Peter's fish.

co, which includes several species of North American finches; -- called also snowbird, or blue snowbird.

Called also May bug or May beetle. -- June grass (Bot.), a New England name for Kentucky blue grass. See Blue glass, and Illustration in Appendix.

One of the United States. Kentucky blue grass (Bot.), a valuable pasture and meadow grass (Poa pratensis), found in both Europe and America. See under Blue grass. -- Kentucky coffee tree (Bot.), a tall North American tree (Gymnocladus Canadensis) with bipinnate leaves. It produces large woody pods containing a few see…

An earth of a blackish or deep blue color. Woodward.