in·di·go

[in-di-goh] noun, plural in·di·gos, in·di·goes, adjective
noun
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.
00:10
Indigo is always a great word to know.
So is ort. Does it mean:
a scrap or morsel of food left at a meal.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.

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

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indigo (ˈɪndɪˌɡəʊ) [Click for IPA pronunciation guide]
 
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

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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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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Example sentences
Indigo ran in and did a cartwheel, screaming for her father to look.
These conquistadors began gold mining, soon enhancing this with industries in
  sugar, coffee and indigo.
Peaks, bathed in reflected light, turn purple and pink under an indigo sky.
Indigo-blue represents weak to light shaking and no damage.
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