01 n. The protuberance through which milk is drawn from the breast or mamma; the mammilla; a teat; a pap.
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1.
The protuberance through which milk is drawn from the breast or mamma; the mammilla; a teat; a pap.(Anat.)
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2.
The orifice at which any animal liquid, as the oil from an oil bag, is discharged.[R.]
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3.
Any small projection or article in which there is an orifice for discharging a fluid, or for other purposes; as, the nipple of a nursing bottle; the nipple of a percussion lock, or that part on which the cap is put and through which the fire passes to the charge.
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4.
A pipe fitting, consisting of a short piece of pipe, usually provided with a screw thread at each end, for connecting two other fittings.(Mech.)
Phrases & compounds
Solder nipple —
a short pipe, usually of brass, one end of which is tapered and adapted for attachment to the end of a lead pipe by soldering.