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old–man's beard

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noun \ˈōl(d)-ˈmanz-\

Definition of old–man's beard

  1. 1 :  any of several clematises (especially Clematis vitalba) having plumose styles

  2. 2 :  a greenish-gray pendulous lichen (Usnea barbata) growing on trees



1742

First Known Use of old–man's beard

1742


Medical Dictionary

old–man's beard

play
noun \ˌōl(d)-ˌmanz-\

Medical Definition of old–man's beard

  1. :  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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