paleencephalon
noun
pa·le·en·ceph·a·lon
ˌpā-lē-in-ˈsef-ə-ˌlän 
variants
or British palae-encephalon
plural paleencephala
-lə
: the phylogenetically older part of the brain consisting of all parts except the cerebral cortex and closely related structures compare neencephalon
Cite this Entry
“Paleencephalon.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/paleencephalon. Accessed 31 Oct. 2025.
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