Definition of metencephalon in English:

metencephalon

Pronunciation /ˌmɛtɛnˈsɛfəlɒn/

noun

Anatomy Zoology
  • The anterior division of the rhombencephalon (hindbrain) in the vertebrate embryo.

Origin

Mid 19th century (in an earlier sense). From meta- + encephalon, perhaps after German Nachhirn afterbrain.