n. (pl. same or reindeers) a subarctic deer, Rangifer tarandus, of which both sexes have large antlers, used domestically for drawing sledges and as a source of milk, flesh, and hide. reindeer moss an arctic lichen, Cladonia rangiferina, with short branched stems growing in clumps.
[ ME f. ON hreind°ri f. hreinn reindeer + d°r DEER ]