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Definitions of lichen
  1. noun
    any of several eruptive skin diseases characterized by hard thick lesions grouped together and resembling lichens growing on rocks
  2. noun
    any thallophytic plant of the division Lichenes; occur as crusty patches or bushy growths on tree trunks or rocks or bare ground etc.
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Definition that contains lichen
  • iceland lichen lichen with branched flattened partly erect thallus that grows in mountainous and Arctic regions; used as a medicine or food for humans and livestock; a source of glycerol
  • evernia lichens of the family Usneaceae having a pendulous or shrubby thallus
  • iceland moss lichen with branched flattened partly erect thallus that grows in mountainous and Arctic regions; used as a medicine or food for humans and livestock; a source of glycerol
  • genus evernia lichens of the family Usneaceae having a pendulous or shrubby thallus
  • alectoria lichens having dark brown erect or pendulous much-branched cylindrical thallus
  • cetraria islandica lichen with branched flattened partly erect thallus that grows in mountainous and Arctic regions; used as a medicine or food for humans and livestock; a source of glycerol
  • genus alectoria lichens having dark brown erect or pendulous much-branched cylindrical thallus
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