What is Teat ?
Teat is (noun) 1. a rubber cap on a baby’s feeding bottle through which the baby sucks milk The baby’s bottle and teat should be sterilised before each feed. (NOTE: Another US term is nipple.) 2. a nipple on a cow’s udder through which the calf drinks milk A cow is milked by squeezing and pulling on the teats.
source: Easier English, Student Dictionary Upper Intermediate Level