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paleencephalon

American  
[pey-lee-en-sef-uh-lon, pal-ee-] / ˌpeɪ li ɛnˈsɛf əˌlɒn, ˌpæl i- /

noun

plural

paleencephala

  1. (no longer in technical use) the more primitive part of the brain in the evolutionary development of animals, including all parts except the cerebral cortex and its related structures.

Etymology

Origin of paleencephalon

First recorded in 1915–20; from New Latin; pale-, encephalon

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.