indigo blue

indigo blue
I. noun
see indigo I, 1b
II. noun
see indigo I, 3

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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 in the dye indigo and which can be produced synthetically.
[1705-15]

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inˈdigotin (or /in-digˈ/) or indigo blue noun
The blue colouring matter of indigo obtained from indican by hydrolysis
• • •
Main Entry:indigo

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indigo blue,
1. the color indigo.
2. the blue coloring matter of indigo, an odorless, crystalline solid insoluble in water or alcohol; indigotin. Formula: C6H10N2O2
in´di|go-blue´, adjective.

Useful english dictionary. 2012.

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

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  • 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.… …  

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