Of, relating to, or of the nature of a commissure, esp. of the nervous system.

Of or relating to the corpus callosum of the brain.

Originally: designating the cingulate sulcus, which lies between the cingulate gyrus and the superior frontal gyrus on the medial surface of the…

situated anterior to a commissure of the brain, esp. to the anterior commissure.

Situated above the optic chiasma or the optic tract (cf. suprachiasmatic adj. at supra-, prefix affix 1a(b)); spec. designating a nucleus of the…

Anatomy. Of or pertaining to the optic chiasma.

located above the optic chiasma (cf. supra-optic, adj.); spec. designating a nucleus of the medial zone of the hypothalamus.