usnea Usnea • Usneaceae · · · Info · Definitions · Characters · · usnea · · Text Latin · · Script 5 · · Length Definitions · · · (noun) widely distributed lichens usually having a greyish or yellow pendulous freely branched thallus. Synonyms: Usnea, genus Usnea. · · Noun Definition 1 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 n latin small letter n U+006E s latin small letter s U+0073 u latin small letter u U+0075