• synonyms


noun, plural di·en·ceph·a·lons, di·en·ceph·a·la [dahy-en-sef-uh-luh] /ˌdaɪ ɛnˈsɛf ə lə/. Anatomy.
  1. the posterior section of the forebrain.
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Origin of diencephalon

From New Latin, dating back to 1880–85; see origin at di-3, encephalon
Related formsdi·en·ce·phal·ic [dahy-en-suh-fal-ik] /ˌdaɪ ɛn səˈfæl ɪk/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for diencephalon


  1. the part of the brain that includes the basal ganglia, thalamus, hypothalamus, and associated areas
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Derived Formsdiencephalic (ˌdaɪɛnsɪˈfælɪk), adjective
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

diencephalon in Medicine


(dī′ĕn-sĕfə-lŏn′, -lən)
  1. The posterior part of the prosencephalon, composed of the epithalamus, the dorsal thalamus, the subthalamus, and the hypothalamus.betweenbrain interbrain
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.