isochor

Century Dictionary and Cyclopedia

1. n. A curve of equal volume upon a diagram in which the rectangular coördinates represent pressure and temperature.

Wiktionary

1. n. alternative spelling of isochore.

GNU Webster's 1913

1. n. (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.