n. [ L. commissura a joining together: cf. F. commissure. See Commit. ]
n. [ L. medius middle + E. commissure. ] (Anat.) A large transverse commissure in the third ventricle of the brain; the middle or soft commissure. B. G. Wildex. [ 1913 Webster ]
n. [ Pref. post- + commisure. ] (Anat.) A transverse commisure in the posterior part of the roof of the third ventricle of the brain; the posterior cerebral commisure. B. G. Wilder. [ 1913 Webster ]
n. [ Pref. præ + commissure. ] (Anat.) A transverse commissure in the anterior part of the third ventricle of the brain; the anterior cerebral commissure. [ 1913 Webster ]