AmericanyoudaoicibaDictYouDict[American 词源字典]
1570s (n.); 1590s (adj.), from Modern Latin Americanus, from America (q.v.); originally in reference to what now are called Native Americans; the sense of "resident of North America of European (originally British) descent" is first recorded 1640s (adj.); 1765 (n.).[American etymology, American origin, 英语词源]