| oesophagogastric orifice | The trumpet-shaped opening of the oesophagus into the stomach. Synonym: ostium cardiacum, cardiac opening, oesophagogastric orifice. (05 Mar 2000) |
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| orifice | An opening. The mouth for example is an orifice. (12 Dec 1998) |
| orifice of inferior vena cava | The orifice through which the inferior vena cava opens into the right atrium. Synonym: ostium venae cavae inferioris, orifice of inferior vena cava. (05 Mar 2000) |
| orifice of internal acoustic meatus | The inner opening of the internal acoustic meatus on the posterior surface of the petrous part of the temporal bone. Synonym: porus acusticus internus, internal acoustic foramen, internal acoustic pore, auditory pore, internal auditory foramen, orifice of internal acoustic meatus. (05 Mar 2000) |
| orifice of superior vena cava | The point of entry of the superior vena cava into the right atrium. Synonym: ostium venae cavae superioris, orifice of superior vena cava. (05 Mar 2000) |
| tricuspid orifice | An atrioventricular opening which leads from the right atrium into the right ventricle of the heart. Synonym: ostium atrioventriculare dextrum, ostium venosum cordis. (05 Mar 2000) |
| ureteric orifice | The opening of the ureter in the bladder, situated one at each lateral angle of the trigone; wide gaping of the ostium usually indicates vesicoureteral reflux. Synonym: ostium ureteris, orificium ureteris, ureteral meatus, ureteral opening. (05 Mar 2000) |
| anomalous uterus | A malformed uterus caused by abnormal development or fusion of the paramesonephric ducts. (05 Mar 2000) |
| arcuate uterus | A uterus with a depression at the fundus; an incomplete uterus bicornis. Synonym: uterus arcuatus. (05 Mar 2000) |
| artery of round ligament of uterus | Origin, inferior epigastric; distribution, round ligament of uterus. Synonym: arteria ligamenti teretis uteri. (05 Mar 2000) |
| bicornate uterus | A uterus that is more or less completely divided into two lateral horns as a result of imperfect fusion of the paramesonephric ducts; it differs from septate uterus, in which there is no external mark of separation; in uterus bicornis, the cervix may be single (uterus bicornate unicollis) or double (uterus bicornate bicollis). Synonym: bifid uterus, uterus bicornis, uterus bifidus. (05 Mar 2000) |
| bifid uterus | A uterus that is more or less completely divided into two lateral horns as a result of imperfect fusion of the paramesonephric ducts; it differs from septate uterus, in which there is no external mark of separation; in uterus bicornis, the cervix may be single (uterus bicornate unicollis) or double (uterus bicornate bicollis). Synonym: bifid uterus, uterus bicornis, uterus bifidus. (05 Mar 2000) |
| biforate uterus | Septate uterus in which the cervix is divided into two by a septum. Synonym: double-mouthed uterus, uterus biforis. (05 Mar 2000) |
| bipartite uterus | A uterus divided into two cavities by an anteroposterior septum. Synonym: bipartite uterus, uterus bilocularis, uterus bipartitus, uterus septus. (05 Mar 2000) |
| body of uterus | The part of the uterus above the isthmus, comprising about two thirds of the non-pregnant organ. Synonym: corpus uteri. (05 Mar 2000) |