Nipple

English Meaning

The protuberance through which milk is drawn from the breast or mamma; the mammilla; a teat; a pap.

1. The small projection near the center of the mammary gland containing the outlets of the milk ducts through which young mammals obtain milk from the adult female; a teat.
2. A corresponding projection of the male breast.
3. The rubber cap on a bottle from which a baby nurses.
4. A pacifier for an infant.
5. Any of various devices functioning like or resembling a nipple, especially:
6. A regulated opening for discharging a liquid, as in a small stopcock.
7. A pipe coupling threaded on both ends.
8. A short extension of pipe to which a nozzle can be attached.
9. A small projection through which grease in a grease gun can be forced into a bearing.
10. A natural or geographic projection resembling a nipple, as a mountain crest.