Adiabatic - Dictionary Definition and Overview

Adiabatic :  adj : occurring without loss or gain of heat; "adiabatic expansion" [ant: diabatic]

Based on WordNet 2.0

Adiabatic : \Ad`i*a*bat"ic\, a. [Gr. ? not passable; 'a priv. _ ? through _ ? to go.] (Physics) Not giving out or receiving heat. -- Ad`i*a*bat`ic*al*ly, adv.

Adiabatic line or curve, a curve exhibiting the variations of pressure and volume of a fluid when it expands without either receiving or giving out heat. --Rankine.

Based on WordNet (r) 2.0 (August 2003)
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