noun

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