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usnea

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noun us·nea \ˈəs-nē-ə, ˈəz-\

Definition of usnea

  1. :  any of a genus (Usnea of the family Usneaceae) of widely distributed lichens (as old-man's beard) that have a grayish or yellow pendulous freely branched thallus



Origin of usnea

New Latin, from Arabic ushna moss


First Known Use: 1597


Learn More about usnea

  1. Medical Dictionary: Definition of "usnea"


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