A pointing stick.
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.
Any small physical protrusion, such as the lumps on the F and J keys on computer keyboards.
A perforated segment that fits into part of the breech of a muzzle-loading gun, on which the percussion cap is fixed.
Any small physical protrusion on an automotive, a machine part or any other part that fits into a groove on another part.
An internally threaded piece which holds a bicycle spoke in place on the rim.
A short tube threaded at both ends, used as a connector.
An artificial nipple (definition 1) used for bottle-feeding infants.
To fit (a baby's bottle, etc.) with a nipple.
To give one's nipple to (a baby) to allow breastfeeding.
A small fleshy projection on a plant.
Any of the small protuberances on the upper surface of the tongue often containing taste buds.
A vascular process of connective tissue extending into and nourishing the root of a hair, feather, or developing tooth.
Any of the vascular protuberances of the dermal layer of the skin extending into the epidermal layer and often containing tactile corpuscles.