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betweenbrain

American

[bih-tween-breyn] / bɪˈtwinˌbreɪn /

noun

the diencephalon.

Etymology

Origin of betweenbrain

First recorded in 1930–35; between + brain

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.