midbrain

mid·brain   (mĭd'brān')    n.  The portion of the vertebrate brain that develops from the middle section of the embryonic brain.

Main Entry: mid·brain
Pronunciation: 'mid-"brAn
Function: noun
: the middle division of the three primary divisions of the developing vertebrate brainor the corresponding part of the adult brain that includes a ventral part containing the cerebral peduncles and a dorsal tectum containing the corpora quadrigemina and that surrounds the aqueduct ofSylvius connecting the third and fourth ventricles called also mesencephalon

midbrain mid·brain (mĭd'brān')
n.
See mesencephalon.

midbrain   (mĭd'brān')  Pronunciation Key  The middle part of the vertebrate brain. In most animals except mammals, the midbrain processes sensory information. In mammals, it serves primarily to connect the forebrain with the hindbrain. Compare forebrain, hindbrain.