The Collaborative International Dictionary of English v.0.48:
Adiabatic \Ad`i*a*bat"ic\, a. [Gr. 'adia`batos not passable; 'a
priv. + dia` through + bai`nein to go.] (Physics)
Not giving out or receiving heat. -- Ad`i*a*bat`ic*al*ly,
[Webster 1913 Suppl.]
Note: The adiabatic expansion of carbon dioxide from a
compressed container causes the temperature of the gas
to decrease rapidly below its freezing point, resulting
in the familiar carbon dioxide "snow" emitted by carbon
dioxide fire extinguishers.
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.