noun (n)

• Arctic deer with large antlers in both sexes; called `reindeer' in Eurasia and `caribou' in North America(noun.animal)

  Synonym:
  caribou, greenland caribou, rangifer tarandus
  

  source: wordnet30
• Any ruminant of the genus Rangifer, of the Deer family, found in the colder parts of both the Eastern and Western hemispheres, and having long irregularly branched antlers, with the brow tines palmate.(noun)

  source: webster1913