Lichen — definition

1. lichen (Noun)

lichen (Noun) — Any of several eruptive skin diseases characterized by hard thick lesions grouped together and resembling lichens growing on rocks.

lichen (Noun) — Any thallophytic plant of the division Lichenes; occur as crusty patches or bushy growths on tree trunks or rocks or bare ground etc..

disease of the skin fungus skin disease skin disorder Cetraria islandica Cladonia rangiferina Iceland lichen Iceland moss Roccella tinctoria Usnea barbata arctic moss ascolichen basidiolichen beard lichen beard moss crotal crottal crottle horsehair lichen horsetail lichen lecanora lichen planus lichen ruber planus reindeer lichen • • • Lichenes division Lichenes