hiatus

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hiatus

Anatomy
1. a natural opening or aperture; foramen
2. a less common word for vulva
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.