a small space or inscription below the principal emblem on a coin or medal, usually on the reverse side (硬币或奖牌背面主要图案下面的)空白处(或镌刻文字)
语源
late 17th cent.: from French, from medieval Latin exergum, from ex- 'out' + Greek ergon 'work' (probably as a rendering of French hors d'oeuvre 'something lying outside the work')