hiatus

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Related to hiatus semilunaris: Ethmoidal bulla, Frontonasal duct, Ostiomeatal Unit

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.
References in periodicals archive ?
5,6) Note that a Lusk ball probe was passed from the hiatus semilunaris superiorly into the ethmoid bulla through its patent ostium.
The anterior ethmoid cells drain into the middle meatus--of ten through the hiatus semilunaris superior, but sometimes through the anterior or lateral bulla wall, the ethmoid infundibulum, the hiatus semilunaris inferior, or the retrobullar recess.
7) The secretions then traverse from the hiatus semilunaris to the medial wall of the inferior turbinate, and then they move posteriorly to the nasopharynx.