orifice

Any aperature or opening.

Specific

aortic orifice/ostium atrioventricular orifice cardial orifice (cardiac or esophagogastric orifice, cardial opening) coronary orifice (ostium/opening of coronary sinus) external urethral orifice frenulum of ileocecal valve/ileal orifice; Morgagni retinaculum/frenum ileal orifice (ileocecal orifice or opening, opening of ileal papilla) internal urethral orifice maxillary orifice/ostium/duct mitral orifice; left atrioventricular/bicuspid orifice orifice (ostium) of vermiform appendix pyloric orifice (gastroduodenal orifice) tricuspid (right atrioventricular) orifice ureteric orifice vaginal orifice

References

Stedman's Medical Dictionary 27th ed, Williams & Wilkins, Baltimore, 1999.