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[fawr-breyn, fohr-] /ˈfɔrˌbreɪn, ˈfoʊr-/
noun, Anatomy.
Also called prosencephalon. the anterior 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 including the diencephalon and telencephalon.
the telencephalon.
Origin of forebrain
First recorded in 1875-80; fore- + brain Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for forebrain
Historical Examples
  • Autopsies on imbeciles show an infantile development of the forebrain.

  • The molecules mingle with the molecules of serum: In seconds they are washed against the cell-walls of the forebrain.

    The Syndic C.M. Kornbluth
  • He jerked his mind away suddenly from the thoughts which had crowded into his forebrain.

    Cum Grano Salis Gordon Randall Garrett
British Dictionary definitions for forebrain


the nontechnical name for prosencephalon
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
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forebrain in Medicine

forebrain fore·brain (fôr'brān')
The prosencephalon.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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forebrain in Science
The forwardmost part of the vertebrate brain. In humans, it consists of the thalamus, the hypothalamus, and the cerebrum. Compare hindbrain, midbrain.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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