archil

Collins
World English Dictionary
archil (ˈɑːtʃɪl)
 
n
a variant spelling of orchil

orchil or archil (ˈɔːkɪl, -tʃɪl)
 
n
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
 
[C15: from Old French orcheil, of uncertain origin]
 
archil or archil
 
n
 
[C15: from Old French orcheil, of uncertain origin]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Encyclopedia Britannica
Encyclopedia

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.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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