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1. The posterior portion of the embryonic hindbrain, from which the medulla oblongata develops.
2. The medulla oblongata of the adult brain.

my′e·len·ce·phal′ic (-sə-făl′ĭk) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


n, pl -lons or -la (-lə)
(Biology) the part of the embryonic hindbrain that develops into the medulla oblongata. Nontechnical name: afterbrain
myelencephalic adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌmaɪ ə lɛnˈsɛf əˌlɒn)

n., pl. -lons, -la (-lə).
the posterior section of the hindbrain, which develops into the medulla oblongata.
my`el•en`ce•phal′ic (-səˈfæl ɪk) adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.myelencephalon - the posterior part of the hindbrain in developing vertebrates; forms the medulla oblongata in adults
neural structure - a structure that is part of the nervous system
hindbrain, rhombencephalon - the posterior portion of the brain including cerebellum and brainstem
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Then, 21 tissues (telencephalon, hypothalamus, mesencephalon, cerebellum, myelencephalon, liver, spleen, heart, eye, skin, foregut, gill, white muscle, hindgut, midgut, red muscle, trunk kidney and gonad) were removed immediately and stored in liquid nitrogen.
It incorporates input from two hemispheres, four lobes in each hemisphere (frontal, temporal, parietal, and occipital), and all five layers of the brain (from the uppermost telencephalon and adjacent diencephalon below it to the middle layers of the mesencephalon to the lower levels of the metencephalon and myelencephalon).
As for HTR3D and HTR3E genes, they have low levels in the amygdala and midbrain, brain stem and myelencephalon. The expression of HTR4 is pronounced in the basal ganglia.