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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 of orchil
1475-1485
1475-85; < Old French
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Based on the Random House Dictionary, © Random House, Inc. 2015.
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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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11
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