old-man's beard

\ ˈōl(d)-ˈmanz- How to pronounce old-man's beard (audio) \

Definition of old-man's beard

1 : any of several clematises (especially Clematis vitalba) having plumose styles
2 : a greenish-gray pendulous lichen (Usnea barbata) growing on trees

First Known Use of old-man's beard

1731, in the meaning defined at sense 1

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The first known use of old-man's beard was in 1731

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Cite this Entry

“Old-man's beard.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/old-man%27s%20beard. Accessed 5 Aug. 2020.

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More Definitions for old-man's beard

old-man's beard

\ ˌōl(d)-ˌmanz- How to pronounce old-man's beard (audio) \

Medical Definition of old-man's beard

: a greenish gray pendulous lichen of the genus Usnea (U. barbata) that grows on trees and is a source of usnic acid

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