thermocouple

noun
ther·mo·cou·ple | \ ˈthər-mə-ˌkə-pəl \

Definition of thermocouple 

: a device for measuring temperature in which a pair of wires of dissimilar metals (such as copper and iron) are joined and the free ends of the wires are connected to an instrument (such as a voltmeter) that measures the difference in potential created at the junction of the two metals

First Known Use of thermocouple

1890, in the meaning defined above

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The first known use of thermocouple was in 1890

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thermocouple

noun
ther·mo·cou·ple | \ ˈthər-mə-ˌkəp-əl \

Medical Definition of thermocouple 

: a device for measuring temperature in which a pair of wires of dissimilar metals (as copper and iron) are joined and the free ends of the wires are connected to an instrument (as a voltmeter) that measures the difference in potential created at the junction of the two metals

More from Merriam-Webster on thermocouple

Britannica.com: Encyclopedia article about thermocouple

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