The Collaborative International Dictionary
Papula \Pap"u*la\, n.; pl. Papul[ae]. [L.]
(Med.) A pimple; a small, usually conical, elevation of the cuticle, produced by congestion, accumulated secretion, or hypertrophy of tissue; a papule.
--Quain.(Zo["o]l.) One of the numerous small hollow processes of the integument between the plates of starfishes.
Wiktionary
n. 1 (context medicine English) A pimple; a small, usually conical, elevation of the cuticle, produced by congestion, accumulated secretion, or hypertrophy of tissue; a papule. 2 (context zoology English) One of the numerous small hollow processes of the integument between the plates of starfishes.
Wikipedia
Papulae (sing. papula), also known as dermal branchiae or skin gills, are projections of the coelom of Asteroidea that serve in respiration and waste removal. Papulae are soft, covered externally with the epidermis, and lined internally with peritoneum. They extend through the mesodermal ossicles and are protected from microscopic larvae by pedicellariae.
Usage examples of "papula".
In pimply acne of the skin, to touch each papula with some of the Compound Spirit of Horse Radish now and again will soon effect a general cure of the ailment.