I`so*di`a*bat"ic (?), a. [Iso- +
Gr. ? to pass through.] (Physics) Pertaining to the
reception or the giving out of equal quantities of heat by a
substance. Rankine.
Isodiabatic lines or curves,
a pair of lines or curves exhibiting, on a diagram of energy, the
law of variation of the pressure and density of a fluid, the one
during the lowering, and the other during the raising, of its
temperature, when the quantity of heat given out by the fluid during
any given stage of the one process is equal to the quantity received
during the corresponding stage of the other. Such lines are said to
be isodiabatic with respect to each other. Compare
Adiabatic.