Ad`i*a*bat"ic (#), a. [Gr. not passable; priv. + through + to go.] Physics
Not giving out or receiving heat.
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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.
© Webster 1913.