Meanings
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noun
· any branching gray-green or...
old man's beardbeard lichen
Word family
Derived forms
usneic
Etymology
Borrowed from New Latin Usnea, the scientific genus name, from Arabic ushna, 'moss or lichen.' The traditional name was applied before the modern recognition that lichens are symbiotic associations, chiefly between a fungus and a photosynthetic partner.