plesiosaurus (n.)youdaoicibaDictYouDict[plesiosaurus 词源字典]
1825, from Modern Latin Pleisiosaurus (1821), coined by English paleontologist William Daniel Conybeare (1787-1857) from Greek plesios "near," related to pelas, + -saurus.[plesiosaurus etymology, plesiosaurus origin, 英语词源]