merganser (n.)youdaoicibaDictYouDict[merganser 词源字典]
type of duck, 1752, coined in Modern Latin (1550s), from Latin mergus "waterfowl, diver" (from mergere "to dip, immerse;" see merge (v.)) + anser "goose" (see goose (n.)).[merganser etymology, merganser origin, 英语词源]