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 for Adiabatic line
From 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.
        [1913 Webster]

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