inversion temperature

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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.