picayune (n.)youdaoicibaDictYouDict[picayune 词源字典]
1804, "coin of small value," probably from Louisiana French picaillon "coin worth 5 cents," earlier the French name of an old copper coin of Savoy (1750), from Provençal picaioun "small copper coin," from picaio "money," of uncertain origin. Adjectival figurative sense of "paltry, mean" recorded from 1813.[picayune etymology, picayune origin, 英语词源]