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usnea |
3 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Usnea \Us"ne*a\, n. [NL., from Ar usnah moss.] (Bot.) 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. From Webster's Revised Unabridged Dictionary (1913) [web1913]: Usnic \Us"nic\, a. (Chem.) Pertaining to or designating, a complex acid obtained, as a yellow crystalline substance, from certain genera of lichens ({Usnea}, {Parmelia}, etc.). From WordNet r 1.6 [wn]: Usnea n : widely distributed lichens usually having a grayish or yellow pendulous freely branched thallus [syn: {Usnea}, {genus Usnea}]
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