diencephalon Meaning, Definition & Usage

  1. noun the posterior division of the forebrain; connects the cerebral hemispheres with the mesencephalon
    interbrain; thalmencephalon; betweenbrain.

WordNet

Di`en*ceph"a*lon noun
Etymology
NL. See Dia-, and Encephalon.
Definitions
  1. (Anat.) The interbrain or thalamencephalon; -- sometimes abbreviated to dien. See Thalamencephalon.

Webster 1913