Any of various hollow-horned, bearded ruminant mammals of the genus Capra, originally of mountainous regions of the Old World, especially any of the domesticated forms of C. hircus, raised for wool, milk, and meat.

• 山羊一种空心角的，长须反刍的。山羊属哺乳动物，起源于东半球山地地区，尤指一种驯化的公山羊品种，饲养用来采皮，挤奶和产肉