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See also: tweenbrain

English

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Alternative forms

Etymology

From 'tween +‎ brain.

Noun

'tweenbrain (plural 'tweenbrains)

  1. (neuroanatomy) The region of the human brain, specifically the human forebrain, that includes the thalamus, the hypothalamus, the epithalamus, the prethalamus or subthalamus, and the pretectum.
    • 1931, Medicine: Tweenbrain & Stomach:
      Deep within the brain is a biologically ancient section called the diencephalon or tweenbrain.
    • 2007, Robb S. Rehberg, Sports Emergency Care: A Team Approach:
      The brainstem constituents include the medulla oblongata, pons varolii, midbrain, and tweenbrain.

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