English edit

 
Orchil (Rocella tinctoria)

Alternative forms edit

Etymology edit

Old French orchel, orseil (modern French orseille), of uncertain origin.

Noun edit

orchil (countable and uncountable, plural orchils)

  1. Any of several lichens, especially those of the genera Roccella and Lecanora.
  2. The purple dye, orcein, extracted from them (especially Lecanora tartarea) and often used as substitute for Tyrian purple.

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