(n) the small opening (on both the right and left sides) that connects the third ventricle in the diencephalon with the lateral ventricle in the cerebral hemisphere, Syn. foramen of Monro, Monro's foramen
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
‖n.; pl. L. Foramina E. Foramines [ L., fr. forare to bore, pierce. ] A small opening, perforation, or orifice; a fenestra. [ 1913 Webster ]
Foramen of Monro (Anat.), the opening from each lateral into the third ventricle of the brain. -- Foramen of Winslow (Anat.), the opening connecting the sac of the omentum with the general cavity of the peritoneum. [ 1913 Webster ]