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[pros-en-sef-uh-lon, -luh n] /ˌprɒs ɛnˈsɛf əˌlɒn, -lən/
noun, plural prosencephalas, prosencephala
[pros-en-sef-uh-luh] /ˌprɒs ɛnˈsɛf ə lə/ (Show IPA).
the forebrain.
Origin of prosencephalon
1840-50; < New Latin < Greek prós(ō) forward (akin to pró pro-2) + enképhalon encephalon
Related forms
[pros-en-suh-fal-ik] /ˌprɒs ɛn səˈfæl ɪk/ (Show IPA),
adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for prosencephalon


noun (pl) -la (-lə)
the part of the brain that develops from the anterior portion of the neural tube Nontechnical name forebrain Compare mesencephalon, rhombencephalon
Derived Forms
prosencephalic (ˌprɒsɛnsɪˈfælɪk) adjective
Word Origin
C19: from New Latin, from Greek prosō forward + enkephalos brain
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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prosencephalon in Medicine

prosencephalon pros·en·ceph·a·lon (prŏs'ěn-sěf'ə-lŏn')

  1. The most anterior of the three primary regions of the embryonic brain, from which the telencephalon and diencephalon develop.

  2. The segment of the adult brain that develops from the embryonic forebrain and includes the cerebrum, thalamus, and hypothalamus.

pros'en·ce·phal'ic (-sə-fāl'ĭk) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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