Middle Greek is a term that refers to the historical period of the Greek language between the classical era and the medieval era. Other terms that could be used to refer to this period include the Byzantine period, the Hellenistic period, or the Late Antiquity period. In terms of the language itself, Middle Greek could also be called Koine Greek, as it was the common language spoken in the Mediterranean region during this time. Additionally, it could be referred to as Byzantine Greek, as the Byzantine Empire was the dominant cultural and political force during this period. Lastly, Middle Greek could also be described as Post-Classical Greek, as it came after the classical era but before the medieval era.