Main Entry: di·en·ceph·a·lon Pronunciation: "dI-&n-'sef-&-"län, "dI-(")en-, -l&n Function: noun : the posteriorsubdivision of the forebrain called also betweenbrain,interbrain —di·en·ce·phal·ic/-s&-'fal-ik/adjective
diencephalon di·en·ceph·a·lon (dī'ěn-sěf'ə-lŏn', -lən) n. The posterior part of the prosencephalon, composed of the epithalamus, the dorsal thalamus, the subthalamus, and the hypothalamus. Also called betweenbrain, interbrain.