orifice(redirected from Atrioventricular orifice)
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Opening or window in a side or end wall of a waveguide or cavity resonator through which energy is transmitted.
(science and technology)
An aperture or hole.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
A mouth, aperture, opening, perforation, passage, or hole. The size of an orifice normally is fixed.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved