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a gap or open space; anatomic nomenclature for various types of openings includes aditus, aperture, foramen, fossa, hiatus, inlet, meatus, orifice, ostium, and outlet.
1. the aperture in the diaphragm for passage of the descending aorta.
2. aortic orifice.
cardiac opening the opening from the esophagus into the stomach.
pulmonary opening (opening of pulmonary trunk) pulmonary orifice.
pyloric opening the opening between the stomach and duodenum.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
the opening in the diaphragm, at the level of vertebra T12, bounded by the two crura, the vertebral column, and the median arcuate ligament, through which the aorta and thoracic duct pass.
Farlex Partner Medical Dictionary © Farlex 2012
The opening in the diaphragm through which the aorta passes.
See also: opening
Medical Dictionary, © 2009 Farlex and Partners