Any minute nipplelike projection; as, the papillæ of the tongue.
- A small nipplelike projection, such as a protuberance on the skin, at the root of a hair or feather, or at the base of a developing tooth.
- One of the small, round or cone-shaped protuberances on the top of the tongue that contain taste buds.
- A pimple or pustule.
- Botany A minute projection on the surface of a stigma, petal, or leaf.