hiatus

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Related to esophageal hiatus, hiatus esophageus: esophageal hiatus hernia

hiatus

Anatomy
1. a natural opening or aperture; foramen
2. a less common word for vulva

hiatus

[hī′ād·əs]
(anatomy)
A space or a passage through an organ.
(geology)
A gap in a rock sequence due to a lack of deposition of a bed or to erosion of beds.