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Thesaurus: foramen

A small opening, perforation, or orifice; a fenestra.

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  1. n. A small opening, perforation, or orifice; a fenestra.
  2. n. a natural opening or perforation through a bone or a membranous structure
  3. 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.
  4. A small opening, perforation, or orifice; a fenestra. Foramenof Monro (Anat.), the opening from each lateral into the thirdventricle of the brain.-- Foramen of Winslow (Anat.), the opening connecting the sac of theomentum with the general cavity of the peritoneum.
  5. n. a natural opening or perforation through a bone or a membranous structure