1. Any thallophytic plant of the division Lichenes; occur as crusty patches or bushy growths on tree trunks or rocks or bare ground etc.
   "Reindeer lichen is an important food source for caribou in the tundra"
    
2. Any of several eruptive skin diseases characterized by hard thick lesions grouped together and resembling lichens growing on rocks
   "The patient was diagnosed with lichen planus, a common form of the condition"

Sounds like: l

Derived forms: lichens

Type of: disease of the skin, fungus, skin disease, skin disorder

Part of: division Lichenes, Lichenes

Encyclopedia: Lichen, Lubusz Voivodeship