Source : Webster's Revised Unabridged Dictionary (1913)

Thermocurrent \Ther"mo*cur`rent\, n. (Physics)
   A current developed or set in motion by heat; specif., an
   electric current, in a heterogeneous circuit, due to
   differences of temperature between the junctions of the
   substances of which the circuit is composed.

Thermocurrent \Ther"mo*cur`rent\, n. [Thermo- + current.]
   (Physics)
   A current, as of electricity, developed, or set in motion, by
   the action of heat.