From The Collaborative International Dictionary of English v.0.48 [gcide]:
Bos \Bos\, prop. n. [L., ox, cow.] (Zool.) A genus of ruminant quadrupeds, including the wild and domestic cattle, distinguished by a stout body, hollow horns, and a large fold of skin hanging from the neck.
From WordNet (r) 3.0 (2006) [wn]:
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