cynosure (n.)youdaoicibaDictYouDict[cynosure 词源字典]
1590s, from Middle French cynosure (16c.), from Latin Cynosura, literally "dog's tail," the constellation (now Ursa Minor) containing the North Star, the focus of navigation, from Greek kynosoura, literally "dog's tail," from kyon (genitive kynos; see canine) + oura "tail" (see arse).[cynosure etymology, cynosure origin, 英语词源]