papillae

(noun) (botany) a tiny outgrowth on the surface of a petal or leaf. Synonyms: papilla.

(noun) a small nipple-shaped protuberance concerned with taste, touch, or smell. Synonyms: papilla. Example: "The papillae of the tongue."

(noun) a small projection of tissue at the base of a hair or tooth or feather. Synonyms: papilla.