Definition of indigo

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Indigo (n.) A blue dyestuff obtained from several plants belonging to very different genera and orders; as, the woad, Isatis tinctoria, Indigofera tinctoria, I. Anil, Nereum tinctorium, etc. It is a dark blue earthy substance, tasteless and odorless, with a copper-violet luster when rubbed. Indigo does not exist in the plants as such, but is obtained by decomposition of the glycoside indican..

Lern More About Indigo

Woad :: Woad (n.) A blue dyestuff, or coloring matter, consisting of the powdered and fermented leaves of the Isatis tinctoria. It is now superseded by indigo, but is somewhat used with indigo as a ferment in dyeing..
Ceroon :: Ceroon (n.) A bale or package. covered with hide, or with wood bound with hide; as, a ceroon of indigo, cochineal, etc..
Uroglaucin :: Uroglaucin (n.) A body identical with indigo blue, occasionally found in the urine in degeneration of the kidneys. It is readily formed by oxidation or decomposition of indican..
Indigometry :: Indigometry (n.) The art or method of determining the coloring power of indigo.
Pyrosulphuric :: Pyrosulphuric (a.) Pertaining to, or designating, an acid called also disulphuric acid) obtained by distillation of certain sulphates, as a colorless, thick, oily liquid, H2S2O7 resembling sulphuric acid. It is used in the solution of indigo, in the manufacture of alizarin, and in dehydration..
Marsdenia :: Marsdenia (n.) A genus of plants of the Milkweed family, mostly woody climbers with fragrant flowers, several species of which furnish valuable fiber, and one species (Marsdenia tinctoria) affords indigo..
Indogen :: Indogen (n.) A complex, nitrogenous radical, C8H5NO, regarded as the essential nucleus of indigo..
Tumbleweed :: Tumbleweed (n.) Any plant which habitually breaks away from its roots in the autumn, and is driven by the wind, as a light, rolling mass, over the fields and prairies; as witch grass, wild indigo, Amarantus albus, etc..
Orpiment :: Orpiment (n.) Arsenic sesquisulphide, produced artificially as an amorphous lemonyellow powder, and occurring naturally as a yellow crystalline mineral; -- formerly called auripigment. It is used in king's yellow, in white Indian fire, and in certain technical processes, as indigo printing..
Indican :: Indican (n.) An indigo-forming substance, found in urine, and other animal fluids, and convertible into red and blue indigo (urrhodin and uroglaucin). Chemically, it is indoxyl sulphate of potash, C8H6NSO4K, and is derived from the indol formed in the alimentary canal. Called also uroxanthin..
Indigofera :: Indigofera (n.) A genus of leguminous plants having many species, mostly in tropical countries, several of them yielding indigo, esp. Indigofera tinctoria, and I. Anil..
Indoin :: Indoin (n.) A substance resembling indigo blue, obtained artificially from certain isatogen compounds..
Indirubin :: Indirubin (n.) A substance isomeric with, and resembling, indigo blue, and accompanying it as a side product, in its artificial production..
Bluing :: Bluing (n.) Something to give a bluish tint, as indigo, or preparations used by washerwomen..
Indium :: Indium (n.) A rare metallic element, discovered in certain ores of zinc, by means of its characteristic spectrum of two indigo blue lines; hence, its name. In appearance it resembles zinc, being white or lead gray, soft, malleable and easily fusible, but in its chemical relation it resembles aluminium or gallium. Symbol In. Atomic weight, 113.4..
Chemistry :: Chemistry (n.) An application of chemical theory and method to the consideration of some particular subject; as, the chemistry of iron; the chemistry of indigo..
Skatol :: Skatol (n.) A constituent of human faeces formed in the small intestines as a product of the putrefaction of albuminous matter. It is also found in reduced indigo. Chemically it is methyl indol, C9H9N..
Xylindein :: Xylindein (n.) A green or blue pigment produced by Peziza in certain kinds of decayed wood, as the beech, oak, birch, etc., and extracted as an amorphous powder resembling indigo..
Anilic :: Anilic (a.) Pertaining to, or obtained from, anil; indigotic; -- applied to an acid formed by the action of nitric acid on indigo..
Indican :: Indican (n.) A glucoside obtained from woad (indigo plant) and other plants, as a yellow or light brown sirup. It has a nauseous bitter taste, a decomposes or drying. By the action of acids, ferments, etc., it breaks down into sugar and indigo. It is the source of natural indigo..
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