FORAMEN

‖Fo‐ra″men (?), n.; pl. L. Foramina (#), E. Foramines (#). [[L., fr. forare to bore, pierce.]] A small opening, perforation, or orifice; a fenestra. 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.