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Indigo   /ˈɪndəgˌoʊ/  /ˈɪndɪgˌoʊ/   Listen
noun
Indigo  n.  (pl. indigoes)  
1.
A kind of deep blue, one of the seven prismatic colors.
2.
(Chem.) A blue dyestuff obtained from several plants belonging to very different genera and orders, such as, the woad, Isatis tinctoria (family Cruciferae), Indigofera suffroticosa, Indigofera tinctoria (family Leguminosae), Indigofera Anil, Nereum tinctorium, Polygonum tinctorium Ait. (family Polygonaceae), etc.; called also natural indigo. 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. Note: Commercial indigo contains the essential coloring principle indigo blue or indigotine, with several other dyes; as, indigo red, indigo brown, etc., and various impurities. Indigo is insoluble in ordinary reagents, with the exception of strong sulphuric acid.
Chinese indigo (Bot.), Isatis indigotica, a kind of woad.
Wild indigo (Bot.), the American herb Baptisia tinctoria which yields a poor quality of indigo, as do several other species of the same genus.


adjective
Indigo  adj.  Having the color of, pertaining to, or derived from, indigo.
Indigo berry (Bot.), the fruit of the West Indian shrub Randia aculeata, used as a blue dye.
Indigo bird (Zool.), a small North American finch (Cyanospiza cyanea). The male is indigo blue in color. Called also indigo bunting.
Indigo blue.
(a)
The essential coloring material of commercial indigo, from which it is obtained as a dark blue earthy powder, with a reddish luster, C16H10N2O2, which may be crystallized by sublimation. Indigo blue is also made from artificial amido cinnamic acid, and from artificial isatine; and these methods are of great commercial importance. Called also indigotin.
(b)
A dark, dull blue color like the indigo of commerce.
Indigo brown (Chem.), a brown resinous substance found in crude indigo.
Indigo copper (Min.), covellite.
Indigo green, a green obtained from indigo.
Indigo plant (Bot.), a leguminous plant of several species (genus Indigofera), from which indigo is prepared. The different varieties are natives of Asia, Africa, and America. Several species are cultivated, of which the most important are the Indigofera tinctoria, or common indigo plant, the Indigofera Anil, a larger species, and the Indigofera disperma.
Indigo purple, a purple obtained from indigo.
Indigo red, a dyestuff, isomeric with indigo blue, obtained from crude indigo as a dark brown amorphous powder.
Indigo snake (Zool.), 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.





Collaborative International Dictionary of English 0.48


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"Indigo" Quotes from Famous Books



... of this type are very active and nervous. The Gopher Snake, or Indigo Snake, is one of the largest found in the United States. It has been known to measure over eight feet in length. It is found from Texas eastward in the Gulf states. Its scales have a polished appearance and are blue black ...
— Pathfinder - or, The Missing Tenderfoot • Alan Douglas
... fortune, near Havana, in the island of Cuba, in an engagement with the great Spanish armament, called the Money Fleet, to indicate the immense wealth which it contained. The booty was safely carried to Amsterdam, and the whole of the treasure, in money, precious stones, indigo, etc., was estimated at the value of twelve million florins. This was indeed a victory worth gaining, won almost without bloodshed, and raising the republic far above the manifold difficulties by which it had been embarrassed. Hein perished in the following year, in a combat with ...
— Holland - The History of the Netherlands • Thomas Colley Grattan
... and rest and hush of beauty and joy. They sat—Delight and Leslie—by their open window, where the smell of the lately harvested hay came over from the wide, sunshiny entrance of the great barn, and away beyond stretched the pine woods, and the hills swelled near in dusky evergreen, and indigo shadows, and lessened far down toward Winnipiseogee, to where, faint and tender and blue, the outline of little Ossipee peeped in between great shoulders so modestly,—seen only through the clearest air on days like this. Leslie's little table, with ...
— Junior Classics, V6 • Various
... analyzed result, as the same is shown on a screen. There the pencil of white light falling from the sun is spread out in the manner of a fan, presenting on the screen the following arrangement of colors: red, orange, yellow, green, blue, indigo ...
— Notable Events of the Nineteenth Century - Great Deeds of Men and Nations and the Progress of the World • Various
... Tel-el-Kebir, the Burmese Campaign, the Black Mountain Expedition, and the Hunga Nagar Campaign, in Cashmere, for which he received the Brevet rank of Major. He has two medals and four clasps and the Khedive Star. (b) Charles Alexander, born on the 21st December, 1862, an indigo planter in Thiroot; (c) Ronald Pierson, M.D., born on the 12th of January, 1863; (d) Mary Charlotte; (e) Henrietta Studd, who died young; (f) Victor Herbert, born on the 17th of September, 1867, of the British East Africa ...
— History Of The Mackenzies • Alexander Mackenzie


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