electric_circuit has definitions from the fields of physics,electronics
1
[ noun ] (physics,electronics) an electrical device that provides a path for electrical current to flow

Used in print

(L. Don Leet and Florence J. Leet, editors, The World of...)

But when waves with a period of between 10 and 40 minutes begin to roll over the ocean , they set_in_motion a corresponding oscillation in a column of mercury which closes an electric_circuit .

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