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orchil

[awr-kil, -chil] /ˈɔr kɪl, -tʃɪl/
noun
1.
a violet coloring matter obtained from certain lichens, chiefly species of Roccella.
2.
any lichen yielding this dye.
Also called archil, orseille.
Origin
1475-1485
1475-85; < Old French
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for orchil

orchil

/ˈɔːkɪl; -tʃɪl/
noun
1.
any of various lichens, esp any of the genera Roccella, Dendrographa, and Lecanora
2.
Also called cudbear. a purplish dye obtained by treating these lichens with aqueous ammonia: contains orcinol, orcein, and litmus
Word Origin
C15: from Old French orcheil, of uncertain origin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Encyclopedia Article for orchil

archil

a violet dye obtained from some lichens by fermentation. It is also the term for any lichen that yields orchil (Roccella, Lecanora, Ochrolechin, and Evernia) and refers to any colour obtained from this dye.

Learn more about archil with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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