nipple /ˈnɪp.əl/noun 10verb 2forms 3 noun10 •The projection of a mammary gland from which, on female therian mammals, milk is secreted. •The nipple and the areola together. •An artificial nipple used for bottle-feeding infants. •A mechanical device through which liquids or gases can be passed in a regulated manner. •A short tube threaded at both ends, used as a connector. •Any small physical protrusion, such as the lumps on the F and J keys on computer keyboards. •Any small physical protrusion on an automotive, a machine part or any other part that fits into a groove on another part. •(humorous) A pointing stick. •An internally threaded piece which holds a bicycle spoke in place on the rim.Turn the nipples on to the bicycle spokes only one turn, for each spoke on the new wheel all the way around until they are all snug, then check alignment. •(historical) A perforated segment that fits into part of the breech of a muzzle-loading gun, on which the percussion cap is fixed.I could tell he didn't agree but he went to the corner and took up his squirrel gun, feeling the nipple for a percussion cap. — 2013 verb2 •To fit (a baby's bottle, etc.) with a nipple. •To give one's nipple to (a baby) to allow breastfeeding. formsnippled · nippling · nipples
