[ep-uh-thal-uh-muh s]
noun, plural ep·i·thal·a·mi [ep-uh-thal-uh-mahy] /ˌɛp əˈθæl əˌmaɪ/. Anatomy.
  1. the dorsal area of the diencephalon containing a habenula and the pineal gland.

Origin of epithalamus

From New Latin, dating back to 1900–05; see origin at epi-, thalamus
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

epithalamus in Medicine


  1. A dorsal segment of the diencephalon containing the habenula and the pineal body.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.