Indigo blue
Indigo In"di*go, a. Having the color of, pertaining to, or derived from, indigo. [1913 Webster]

{Indigo berry} (Bot.), the fruit of the West Indian shrub {Randia aculeata}, used as a blue dye.

{Indigo bird} (Zo["o]l.), 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} (Zo["o]l.), 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. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

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  • indigo blue — indigo blue, adj. 1. indigo (def. 4). 2. Also called indigo, indigotin. a dark blue, water insoluble, crystalline powder, C16H10N2O2, having a bronzelike luster, the essential coloring principle of which is contained along with other substances… …   Universalium

  • indigo blue — n. 1. INDIGOTIN 2. INDIGO (sense 3) indigo blue adj …   English World dictionary

  • Indigo blue — est un manga de type Yuri en 1 volume. Dessin et scénario : Ebine Yamaji. C est le troisième de cette mangaka. Sommaire 1 Synopsis 2 Éditeur 3 Articles connexes …   Wikipédia en Français

  • indigo blue — I. noun see indigo I, 1b II. noun see indigo I, 3 * * * indigo blue, adj. 1. indigo (def. 4). 2. Also called indigo, indigotin. a dark blue, water insoluble, crystalline powder, C16H …   Useful english dictionary

  • indigo blue — in′digo blue′ n. 1) indigo 4) 2) chem. Also called indigo 2) indigotin a dark blue, water insoluble, crystalline powder, C 16 H 10 N 2 O 2 , the coloring principle of the dye indigo. • Etymology: 1705–15 in′di•go blue′, adj …   From formal English to slang

  • indigo blue — /ɪndɪgoʊ ˈblu/ (say indigoh blooh) noun 1. the colour indigo. 2. the essential colouring principle (a chemical compound, C16H10N2O2), which is contained, together with other substances, in the dye indigo, and which is now prepared artificially.… …   Australian English dictionary

  • indigo blue — SYN: indigo. * * * indigotin …   Medical dictionary

  • indigo-blue — adjective see indigo II …   Useful english dictionary

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