pressure-altitude variation
pressure-altitude variation
[′presh·ər ¦al·tə‚tüd ‚ver·ē′ā·shən] (meteorology)
The pressure difference, in feet or meters, between mean sea level and the standard datum plane.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.