Isochor \I"so*chor\ ([imac]"s[-o]*k[^o]r), n. [Iso- + Gr. xhw`ra
space.] (Physics)
A line upon a thermodynamic diagram so drawn as to represent
the pressures corresponding to changes of temperature when
the volume of the gas operated on is constant. --
{I`so*chor"ic}, a.
[Webster 1913 Suppl.]