dipper (n.)youdaoicibaDictYouDict[dipper 词源字典]
late 14c., as a type of diving bird, agent noun from dip (v.). As a ladle or long-handled utensil for drawing liquid, from 1783, chiefly American English. As the popular U.S. name for the asterism known in Britain as The Plough or Charles' Wain, attested by 1833.[dipper etymology, dipper origin, 英语词源]