exergue
/ɪkˈsəːɡ
/ /ɛkˈsəːɡ / /ˈɛksəːɡ /noun
A small space or inscription below the principal emblem on a coin or medal, usually on the reverse side.
Origin
Late 17th century: 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').