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Table of Contents -- indigo POS
HYPHEN
WORDNET DICTIONARY
CIDE DICTIONARY
OXFORD DICTIONARY
ROGET THESAURUS

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indigo

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POS

Noun

HYPHEN

in=di=go

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WORDNET DICTIONARY

Noun indigo has 3 senses

indigo(n = noun.substance) anil, indigotin - a blue dye obtained from plants or made synthetically;

is a kind of dye, dyestuff

indigo(n = noun.plant) indigo plant, indigofera tinctoria - deciduous subshrub of southeastern Asia having pinnate leaves and clusters of red or purple flowers; a source of indigo dye;

is a member of genus indigofera, indigofera

has particulars: anil, indigofera anil, indigofera suffruticosa

is a kind of bush, shrub

indigo(n = noun.attribute) - a blue-violet color;

is a kind of

reddish blue

violet

Adjective indigo has 1 sense

indigo(s = adj.all) - having a color between blue and violet; "indigo flowers"

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CIDE DICTIONARY

indigo, n. [F. indigo, Sp. indigo, indico, L. indicum indigo, fr. Indicus Indian. See Indian.].

A kind of deep blue, one of the seven prismatic colors. [1913 Webster]
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. [1913 Webster]
" 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." [1913 Webster]

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.

indigo, 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 (Zoöl.), 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 (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.

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OXFORD DICTIONARY

indigo, n. (pl. -os)
1 a a natural blue dye obtained from the indigo plant. b a synthetic form of this dye.
2 any plant of the genus Indigofera.
3 (in full indigo blue) a colour between blue and violet in the spectrum.

Derivative

indigotic adj.

Etymology

16th-c. indico (f. Sp.), indigo (f. Port.) f. L indicum f. Gk indikon INDIAN (dye)

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ROGET THESAURUS

indigo

Blueness

N blueness, blue, garter-blue, watchet, ultramarine, smalt, cobalt, cyanogen, Prussian blue, syenite blue, bice, indigo, zaffer, lapis lazuli, sapphire, turquoise, indicolite, blueness, bluishness, bloom, blue, azure, cerulean, sky-blue, sky-colored, sky-dyed, cerulescent, powder blue, bluish, atmospheric, retiring, cold.

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