In anatomy, a hiatus is a natural fissure in a structure. Examples include:
- Adductor hiatus
- Aortic hiatus
- Esophageal hiatus, the opening in the diaphragm through which the esophagus passes from the thorax into the abdomen
- Greater petrosal nerve hiatus
- Maxillary hiatus
- Sacral hiatus
- Semilunar hiatus
- Urogenital hiatus
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