资料来源 : Webster's Revised Unabridged Dictionary (1913)

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.

资料来源 : WordNet®

foramen of Monro
     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: {interventricular
         foramen}, {Monro's foramen}]