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midbrain

[mid-breyn]
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noun Anatomy.
  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.
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Origin of midbrain

First recorded in 1870–75; mid- + brain
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for midbrain

midbrain

noun
  1. the nontechnical name for mesencephalon
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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

midbrain in Medicine

midbrain

(mĭdbrān′)
n.
  1. mesencephalon

midbrain in Science

midbrain

[mĭdbrān′]
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.