indigoblue

indigo blue

noun
1.
indigo ( def 4 ).
2.
Also called indigo, indigotin. a dark-blue, water-insoluble, crystalline powder, C 16 H 10 N 2 O 2 , 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.

Origin:
1705–15

indigo-blue, adjective
Dictionary.com Unabridged

indigo

[in-di-goh]
noun, plural indigos, indigoes.
1.
a blue dye obtained from various plants, especially of the genus Indigofera, or manufactured synthetically.
2.
indigo blue ( def 2 ).
3.
any of numerous hairy plants belonging to the genus Indigofera, of the legume family, having pinnate leaves and clusters of usually red or purple flowers.
4.
a color ranging from a deep violet blue to a dark, grayish blue.
adjective
5.
Also called indigo-blue, indigotic. of the color indigo.

Origin:
1545–55; < Spanish or Portuguese, variant of índico < Latin indicum < Greek indikón, noun use of neuter of Indikós Indic

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
indigo (ˈɪndɪˌɡəʊ)
 
n , pl -gos, -goes
1.  Also called: indigotin a blue vat dye originally obtained from plants but now made synthetically
2.  Compare wild indigo any of various tropical plants of the leguminous genus Indigofera, such as the anil, that yield this dye
3.  a.  any of a group of colours that have the same blue-violet hue; a spectral colour
 b.  (as adjective): an indigo carpet
 
[C16: from Spanish indico, via Latin from Greek Indikos of India]
 
indigotic
 
adj

indigo blue
 
n, —adj
indigo the full name for indigo

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

indigo
1555, from Sp. indico, Port. endego, and Du. (via Port.) indigo, all from L. indicum "indigo," from Gk. indikon "blue dye from India," lit. "Indian (substance)," neut. of indikos "Indian," from India (see India). Earlier name in Mediterranean languages was annil, anil (see aniline).
Online Etymology Dictionary, © 2010 Douglas Harper
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