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rugae (n.)
[rugae 词源字典]
plural of
ruga
(1775), from Latin
ruga
"a wrinkle in the face," from PIE
*rug-
, variant of
*reue-
(2) "to smash, knock down, tear up, dig up, uproot" (see
rough
(adj.)).
[rugae etymology, rugae origin, 英语词源]
[rugae 词源字典]