a large wild animal that can run very fast, eats grass, and has horns.——朗文当代大辞典

The general name of a family ( Cervidæ) of ruminant quadrupeds, distinguished by the possession of deciduous branching horns or antlers, and by the presence of spots on the young: the various genera and species being distinguished as reindeer, moose-deer, red deer, fallow deer; the musk deer n.   belong to a different family, Moschidæ.——牛津当代大辞典  @en