usnea

noun
us·​nea | \ ˈə-snē-ə How to pronounce usnea (audio) , ˈəz-nē- How to pronounce usnea (audio) \

Definition of usnea

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

First Known Use of usnea

1597, in the meaning defined above

History and Etymology for usnea

New Latin, from Arabic ushna moss

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Time Traveler for usnea

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The first known use of usnea was in 1597

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Cite this Entry

“Usnea.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/usnea. Accessed 2 Dec. 2020.

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More Definitions for usnea

Usnea

noun
Us·​nea | \ ˈəs-nē-ə How to pronounce Usnea (audio) \

Medical Definition of Usnea

: a genus of widely distributed lichens (family Usneaceae) including old-man's beard from which usnic acid is obtained

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