"pimple, small inflammatory elevation of the skin," 1864, from Latin papula "pustule, pimple, swelling" (see pap (n.2)). Papula in the same sense is attested in English from 1706. Related: Papular.
papish
papist
papoose
paprika
Papuan
papule
papyrus
par
par excellence
para-
Parabellum