Thermojunction

noun

1. The point of contact between two dissimilar metals in a thermocouple at which a thermoelectric current is produced.
2. The point of union of the two metals of a thermo-electric couple.
3. There are two such points in the circuit of a thermo-element. It is upon the difference of temperature of the two junctions for a given pair of metals that the electromotive force of the element depends.
4. A junction of two dissimilar conductors used to produce a thermoelectric current, as in one form of pyrometer; a thermocouple.
5. a junction between two dissimilar metals across which a voltage appears