anatomical structure, bodily structure, body structure, complex body part, structure - a particular complex anatomical structure; "he has good bone structure"

hypophyseal stalk - the funnel-shaped stalk connecting the pituitary gland to the hypothalamus

betweenbrain, diencephalon, interbrain, thalmencephalon - the posterior division of the forebrain; connects the cerebral hemispheres with the mesencephalon