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papilla (n.)
[papilla 词源字典]
plural
papillae
, 1690s, "nipple," from Latin
papilla
"nipple," diminutive of
papula
"swelling" (see
pap
(n.2)). Meaning "nipple-like protuberance" attested from 1713.
[papilla etymology, papilla origin, 英语词源]
[papilla 词源字典]