protuberant (adj.)youdaoicibaDictYouDict[protuberant 词源字典]
1640s, from French protubérant (16c.) and directly from Late Latin protuberantem (moninative protuberans), present participle of protuberare "to swell, bulge out" (see protuberance). Related: Protuberantly.[protuberant etymology, protuberant origin, 英语词源]