teat

Concise Oxford English Dictionary © 2008 Oxford University Press:
teat/tiːt/

▶noun

• 1 a nipple of the mammary gland of a female mammal.

• 2 Brit. a perforated plastic bulb through which an infant or young animal can suck milk from a bottle.

– origin ME: from OFr. tete, prob. of Gmc origin.