pseudoadiabatic expansion

pseudoadiabatic expansion

[¦sü·dō‚ad·ē·ə′bad·ik ik′span·shən]
(geophysics)
A saturation-adiabatic process in which the condensed water substance is removed from the system, and which therefore is best treated by the thermodynamics of open systems; meteorologically, this process corresponds to rising air from which the moisture is precipitating.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.