nautilus (n.)youdaoicibaDictYouDict[nautilus 词源字典]
marine cephalopod, c. 1600, from Latin nautilus, in Pliny a kind of marine snail (including also squid, cuttlefish, polyps, etc.), from Greek nautilos "paper nautilus," literally "sailor," from nautes "sailor," from naus "ship" (see naval). The cephalopod formerly was thought to use its webbed arms as sails.[nautilus etymology, nautilus origin, 英语词源]