D defs.my
Entry 1 sense Webster, 1913

Foramen

/fẽr-ām'-ən/ · Fo·ra·men · IPA /fəˈɹeɪ.mən/
01 n. A small opening, perforation, or orifice; a fenestra.
pl. Foramina, Foramines ((#))
  1. 1.
    A small opening, perforation, or orifice; a fenestra.
Phrases & compounds
Foramen of Monro — the opening from each lateral into the third ventricle of the brain.
Foramen of Winslow — the opening connecting the sac of the omentum with the general cavity of the peritoneum.