midbrain


mid·brain

noun \ˈmid-ˌbrān\

Definition of MIDBRAIN

: the middle of the three primary divisions of the developing vertebrate brain or the corresponding part of the adult brain between the forebrain and hindbrain that includes the tectum, tegmentum, and substantia nigra —called also mesencephalon — see brain illustration

First Known Use of MIDBRAIN

1864

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