Definition of postcerebellar in US English:

postcerebellar

adjective

Anatomy
  • Relating to or situated in the posterior cerebellum; specifically designating either of a pair of arteries (the posterior inferior cerebellar arteries) that are branches of the vertebral arteries at the base of the brain and are the hindmost of the three pairs of arteries supplying blood to the cerebellum.

Origin

Late 19th century; earliest use found in Burt Green Wilder (1841–1925).