Definition of Palaeologan in US English:

Palaeologan

(also Palaiologan, Paleologan)

adjective

  • Of or relating to the Byzantine Empire during the rule of the Palaiologos dynasty (1261–1453) in Constantinople (modern Istanbul), especially its culture and learning; of or relating to the Palaiologos dynasty.

Origin

1930s; earliest use found in American Journal of Archaeology. From the name of Michael VIII Palaeologus (Byzantine Greek Παλαιολόγος), the Byzantine emperor who founded the dynasty + -an.