Nip'ple, n.

n. [A-S. nypete; allied to nibble, q. v.]

1. The spongy, conical protuberance by which milk is drawn from the breasts of females; a teat; a pap.
2. The orifice at which any animal liquor is separated. [Rare.] Derham.
3. Any small projection in which there is an orifice for discharging a fluid, or for other purposes; as, the nipple of a percussion-lock, or that part on which the cap is put to be fired.

Nipple shield, a protection for the breast, worn by women. Simmonds.