(anatomy) The projection of a mammary gland from which, on female mammals, milk is secreted. / A mechanical device through which liquids or gases can be passed in a regulated manner.

(transitive) To fit (a baby's bottle, etc.) with a nipple. / (transitive) To give one's nipple to (a baby) to allow breastfeeding.

plural of nipple

(often in combination) Having (a specific type or number of) nipples.

present participle of nipple

Either of a pair of metal clamps, usually joined by a chain, meant to be worn on the nipples to cause pain, usually in BDSM.

plural of nipple cripple

(slang) A school prank, the act of taking a person's nipple between the thumb and forefinger and then twisting it around roughly.

A fitting fixed to a piece of machinery, used as an inlet for lubricating grease by means of a grease gun.

Any of a number of mammiform cacti of the genus Mammillaria.