‖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.