foramen

/fəˈreɪmən/

/fəˈreɪmɪn/

Other forms: foramina

Definitions of foramen

1. noun

   a natural opening or perforation through a bone or a membranous structure
   synonyms: hiatus

   types:

   Monro's foramen, foramen of Monro, interventricular foramen

   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

   foramen magnum

   the large opening at the base of the cranium through which the spinal cord passes

   type of:

   gap, opening

   an open or empty space in or between things