Pronunciation: (pu-pil'u),[key] —n., —pl.-pil•laePronunciation: (-pil'ē).[key] 1. any small, nipplelike process or projection.
2. one of certain small protuberances concerned with the senses of touch, taste, and smell: the papillae of the tongue. 3. a small vascular process at the root of a hair.
4. a papule or pimple.