| 释义 | 
		pa·pil·la \pəˈpilə\ noun (plural papil·lae \-iˌlē, -ˌlī\) Etymology: Latin 1. obsolete  : the nipple of the breast 2. [New Latin, from Latin, nipple]  : a small projecting body part similar to a nipple in form:  a.  : a vascular process of connective tissue extending into and nourishing the root of a hair, feather, or developing tooth  b.  : one of the vascular protuberances of the dermal layer of the skin extending into the epidermal layer and often containing tactile corpuscles  c.  : the apex of a Malpighian pyramid of the kidney  d.  : one of the small protuberances on the upper surface of the tongue — see circumvallate papilla, filiform papilla, fungiform papilla |