Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun lichen

2 senses of lichen

Sense 1
lichen -- (any of several eruptive skin diseases characterized by hard thick lesions grouped together and resembling lichens growing on rocks)
       => skin disease, disease of the skin, skin disorder -- (a disease affecting the skin)

Sense 2
lichen -- (any thallophytic plant of the division Lichenes; occur as crusty patches or bushy growths on tree trunks or rocks or bare ground etc.)
       => fungus -- (an organism of the kingdom Fungi lacking chlorophyll and feeding on organic matter; ranging from unicellular or multicellular organisms to spore-bearing syncytia)