papilla

noun5

1. •
   A nipple-like protuberance on a part or organ of the body.
2. •
   A vascular process of connective tissue extending into and nourishing the root of a hair, feather, or developing tooth.
3. •
   Any of the vascular protuberances of the dermal layer of the skin extending into the epidermal layer and often containing tactile corpuscles.
4. •
   Any of the small protuberances on the upper surface of the tongue often containing taste buds.
5. •
   A small fleshy projection on a plant.