dovetailyoudaoicibaDictYouDict[dovetail 词源字典]
late 16c. (n.), 1650s (v.), from dove (n.) + tail. So called from resemblance of shape in the tenon or mortise of the joints to that of the bird’s tailfeather display. Related: Dovetailed.[dovetail etymology, dovetail origin, 英语词源]