reindeer moss

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noun

any of several lichens of the genus Cladonia, especially the gray, many-branched C. rangiferina, of arctic and subarctic regions, eaten by reindeer and caribou.

Origin of reindeer moss

First recorded in 1745–55
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for reindeer moss

reindeer moss

noun

any of various lichens of the genus Cladonia, esp C. rangiferina, which occur in arctic and subarctic regions, providing food for reindeer

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