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lichen

li·chen

lichen

 
pronunciation:
laI kn
features:
Word Combinations (noun), Word Explorer
part of speech: noun
definition 1: any of various organisms resulting from the symbiotic association of a photosynthetic alga with a fungus, giving rise to a usu. greenish or reddish undifferentiated mass with a scaly, crustlike, or branching form.
definition 2: one of a variety of skin diseases characterized by scaly lesions.
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derivations: lichenoid (adj.), lichenous (adj.)
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See
  fungus, tundra