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Indigo blue

   Also found in: Medical, Encyclopedia, Wikipedia, Hutchinson 0.07 sec.
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.
A dark, dull blue color like the indigo of commerce.

See also: Indigo Indigo



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Charles looked round, and though completely attired in indigo blue, vanished into the shed, and was seen no more.
Howards End by Forster, E. M. View in context
He could see the evening gatherings, held on the circle of the threshing- floors, because that was the only level ground; could see the wonderful unnamed green of the young rice, the indigo blues of the Indian corn, the dock-like patches of buckwheat, and, in its season, the red bloom of the amaranth, whose tiny seeds, being neither grain nor pulse, make a food that can be lawfully eaten by Hindus in time of fasts.
The Second Jungle Book by Kipling, Rudyard View in context
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