[reindeer moss] n (ca. 1753): 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
REINDEER MOSS
Meaning of REINDEER MOSS in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012