n.

1. 奶头；乳头状突起
2. 奶嘴

n.

1. the small projection in which the mammary ducts of female mammals terminate and from which milk can be secreted.
   ▸the corresponding vestigial structure in a male.
   ▸N. Amer. the teat of a feeding bottle.
2. a small projection on a machine, especially one from which oil or other fluid is dispensed.
   ▸a short section of pipe with a screw thread at each end for coupling.