Teat
Teat (tēt) , noun
[Old English tete, titte, Anglo-Saxon tit, titt; akin to LG. & OD. titte, Dutch tet, German zitze: compare French tette, probably of Teutonic origin.]
1.
The protuberance through which milk is drawn from the udder or breast of a mammal; a nipple; a pap; a mammilla; a dug; a tit.
2.
(Machinery) A small protuberance or nozzle resembling the teat of an animal.