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1. (n.) usnea
any pale green or gray, mosslike lichen of the genus Usnea, common on rocks and trees.
Etymology: (1590–1600; < NL, ML < Ar or Pers ushnah)
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| Definition of 'Usnea' |
Princeton's WordNet |
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1. (noun) Usnea, genus Usnea
widely distributed lichens usually having a greyish or yellow pendulous freely branched thallus
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| Definition of 'Usnea' |
Webster Dictionary |
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1. (noun) Usnea
a genus of lichens, most of the species of which have long, gray, pendulous, and finely branched fronds. Usnea barbata is the common bearded lichen which grows on branches of trees in northern forests
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| Definition of 'Usnea' |
U.S. National Library of Medicine |
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1. Usnea
A genus of lichens containing usnic acid and mucilage. Usnea barbata has been used as an herbal medicine.
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Definitions of Usnea 
