papilla

n. nipple; nipple-like projection; wart, pimple

A papilla (plural: papillae) can be:A small projection, such as a nipple-like projection on the skin, at the base of a hair or the root of a feather; the base of a new tooth.A pimple or blisterAn interdental papilla is the part of gingiva located between teeth.Dental papillaRenal papillaLacrimal papillaMammary papillaAny of the small projections on the top of the tongue:vallate papilla (contains taste buds)fungiform papilla (contains taste buds)filiform papilla (does not contain taste buds)foliate papilla (contains taste buds)Alternative name for the Optic disc of the eye.Genital papilla, found in fishes.
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Papilla /pa·pil·la/ pl. papil´lae [L.] a small nipple-shaped projection or elevation. circumvallate papillae vallate papillae. [more]Papilla - Community and Resources

Noun
1. a small nipple-shaped protuberance concerned with taste, touch, or smell; "the papillae of the tongue"
(hypernym) process, outgrowth, appendage
(part-holonym) sense organ, sensory receptor, receptor
2. a small projection of tissue at the base of a hair or tooth or feather
(hypernym) process, outgrowth, appendage

n. papilla, pimple