Noun | 1. | ![]() mammal genus - a genus of mammals Bovidae, family Bovidae - true antelopes; cattle; oxen; sheep; goats sheep - woolly usually horned ruminant mammal related to the goat wether - male sheep especially a castrated one lamb - young sheep domestic sheep, Ovis aries - any of various breeds raised for wool or edible meat or skin Marco Polo sheep, Marco Polo's sheep, Ovis poli - Asiatic wild sheep with exceptionally large horns; sometimes considered a variety of the argali (or Ovis ammon) Ovis vignei, urial - bearded reddish sheep of southern Asia Dall sheep, Dall's sheep, Ovis montana dalli, white sheep - large white wild sheep of northwestern Canada and Alaska bighorn sheep, Ovis canadensis, Rocky Mountain bighorn, Rocky Mountain sheep, cimarron, bighorn - wild sheep of mountainous regions of western North America having massive curled horns |