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 oesophagus passes from the thorax into the abdomen
 - Greater petrosal nerve hiatus
 - Maxillary hiatus
 - Sacral hiatus
 - Semilunar hiatus
 
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