usnea
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us·ne·a
(ŭs′nē-ə, ŭz′-)n.
Any of various widely distributed lichens of the genus Usnea, characterized by a pendulous, usually branched thallus, often growing on trees.
[From Arabic 'ušna, moss; akin to Persian ušna.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
usnea
(ˈʌsnɪə)n
(Plants) a lichen that hangs from tree branches. Also called: old man's beard
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
us•ne•a
(ˈʌs ni ə)n., pl. -ne•as.
any pale green or gray, mosslike lichen of the genus Usnea, common on rocks and trees.
[1590–1600; < New Latin, Medieval Latin < Arabic or Persian ushnah]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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| Noun | 1. |  Usnea - widely distributed lichens usually having a greyish or yellow pendulous freely branched thallusfungus genus - includes lichen genera family Usneaceae, Usneaceae - fruticose lichens having prostrate or erect or pendulous thalli: genera Usnea, Evernia, Ramalina, Alectoria |
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