adiabat
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Related to adiabat: isotherm, moist adiabat
adiabat
[′ad·ē·ə‚bat] (meteorology)
The relatively constant rate (5.5°F/100 feet or 10°C/kilometer) at which a mass of air cools as it rises.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.