Dictionary![]() ![]() or•chilPronunciation: (ôr'kil, -chil), [key] —n. 1. a violet coloring matter obtained from certain lichens, chiefly species of Roccella. 2. any lichen yielding this dye. Also called archil, orseille. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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