inversion temperature

inversion temperature

[in′vər·zhən ‚tem·prə·chər] (engineering) The temperature to which one junction of a thermocouple must be raised in order to make the thermoelectric electromotive force in the circuit equal to zero, when the other junction of the thermocouple is held at a constant low temperature. (thermodynamics) The temperature at which the Joule-Thomson effect of a gas changes sign.