lavalier (n.)youdaoicibaDictYouDict[lavalier 词源字典]
kind of ornament that hangs around the neck, from French lavallière, a kind of tie, after Louise Françoise de La Baume Le Blanc de La Vallière, Duchesse de La Vallière (1644-1710), mistress of Louis XIV from 1661-1667.[lavalier etymology, lavalier origin, 英语词源]