lichen

Từ điển WordNet v3.1 - WordNet Dictionary

noun

1. any of several eruptive skin diseases characterized by hard thick lesions grouped together and resembling lichens growing on rocks
• Hypernyms:
skin disease, disease of the skin, skin disorder
• Hyponyms:
lichen planus, lichen ruber planus
2. any thallophytic plant of the division Lichenes;
occur as crusty patches or bushy growths on tree trunks or rocks or bare ground etc.
• Hypernyms:
fungus
• Hyponyms:
ascolichen, basidiolichen, lecanora, roccella, Roccella tinctoria,
beard lichen, beard moss, Usnea barbata, horsehair lichen, horsetail lichen, reindeer moss,
reindeer lichen, arctic moss, Cladonia rangiferina, crottle, crottal, crotal,
Iceland moss, Iceland lichen, Cetraria islandica
• Member Holonyms:
Lichenes, division Lichenes