Hiatus (anatomy)

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
 * Urogenital hiatus