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.