- any small, nipplelike process or projection.
- one of certain small protuberances concerned with the senses of touch, taste, and smell: the papillae of the tongue.
- a small vascular process at the root of a hair.
- a papule or pimple.
- the small projection of tissue at the base of a hair, tooth, or feather
- any other similar protuberance
- any minute blunt hair or process occurring in plants
