pa·pil·la 
(pə-pĭlə)
(pə-pĭlə)n. pl. pa·pil·lae (-pĭlē)
1. 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.
2. One of the small, round or cone-shaped protuberances on the top of the tongue that contain taste buds.
3. A pimple or pustule.
4. Botany A minute projection on the surface of a stigma, petal, or leaf.
[Latin, nipple, diminutive of papula, swelling, pimple.]
papil·lar′y (păpə-lĕr′ē, pə-pĭlə-rē) adj.
papil·late′ (păpə-lāt′, pə-pĭlĭt) adj.
pap·il·lose (păpə-lōs′, pə-pĭlōs′) adj.