[ mid-breyn ]

  1. the middle of the three primary divisions of the brain in the embryo of a vertebrate or the part of the adult brain derived from this tissue; mesencephalon.

Origin of midbrain

First recorded in 1870–75; mid- + brain

Words Nearby midbrain

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How to use midbrain in a sentence

British Dictionary definitions for midbrain


/ (ˈmɪdˌbreɪn) /

  1. the nontechnical name for mesencephalon

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for midbrain


[ mĭdbrān′ ]

  1. 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.

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