adiabatic

[Gr. ἀδιάβατος ( adiabatos ) not to be cro ed or pa ed à, priv.; διαβατός ( diabatos ) = to be cro ed or pa ed; διαβαίνω ( dial a inō ) =to step acro , to pa over: διά ( dia ) = through; βαίνω ( bainō ) =to walk, to go.] Not able to be cro ed or pa ed. Nat. Phil . Adiabatic compre ion of a fluid: Compre ion under such circumstances that no heat enters or leaves the fluid. (Everett: The C.G.S. System of Units , ch. ix., p. 55.) a-di-a-bat-ic-al-lý, adv . [ADIABATIC.] In such a way that there is no pa age through. "Increase of pre ure adiabatically ."- Ibid . , p. 55.