Meaning of NIPPLE in English
( n. )
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.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012