Definition of reindeer moss
: a gray, erect, tufted, and much-branched lichen (Cladonia rangiferina) that forms extensive patches in arctic and north-temperate regions, constitutes a large part of the food of caribou, and is sometimes eaten by humans —called also reindeer lichen
First Known Use of reindeer moss
Learn More about reindeer moss
Britannica.com: Encyclopedia article about reindeer moss
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