
1) Any lichen yielding this dye 2) Archil 3) Cudbear 4) Dye obtained from a lichen 5) Dyestuff 
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1) Archil 2) Cudbear 
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• (n.) See Archil.
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http://thinkexist.com/dictionary/meaning/orchil/

a violet dye obtained from some lichens by fermentation. It is also the term for any lichen that yields orchil (Roccella, Lecanora, Ochrolechin, and ... [2 related articles]
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http://www.britannica.com/eb/a-z/o/27

Synonym for archil ... 1. A violet dye obtained from several species of lichen (Roccella tinctoria, etc), which grow on maritime rocks in the Canary and Cape Verd Islands, etc. ... 2. The plant from which the dye is obtained. ... Alternative forms: orchal and orchil. ... Origin: OF. Orchel, orcheil, It. Orcella, oricello, or OSp. Orchillo. Cf. Orch...
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Or'chil  noun  See 
 Archil . 
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http://www.encyclo.co.uk/webster/O/29

Type: Term Pronunciation: ōr′kil Synonyms: archil
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[
n] - a purplish dye obtained from orchil lichens
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http://www.webdictionary.co.uk/definition.php?query=orchil
archil noun a purplish dye obtained from orchil lichens
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https://www.encyclo.co.uk/local/20974

a violet coloring matter obtained from certain lichens, chiefly species of Roccella. · any lichen yielding this dye. Also called
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https://www.infoplease.com/dictionary/orchil
  No exact match found.