episemon

From Byzantine Greek ἐπίσημον (epísēmon), from Ancient Greek ἐπίσημος (epísēmos, “distinguished; remarkable”), from ἐπί (epí, “above”) + σῆμα (sêma, “sign”).

episemon (plural episemons or episema)

1. An insignia or some other distinguishing symbol.
2. The Greek letter digamma.
3. The digamma, koppa, or sampi as a Greek numeral sign.

• episememe
• semeion

• semiopen