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The term is used loosely for any device or subsystem using electrical or electronic components. E.g. "That lightning bolt fried the circuits in my GPS receiver". An integrated circuit (IC) contains components built on a Silicon die.
the apparent diurnal revolution of the sun round the earth (Ps. 19:6), and the changes of the wind (Eccl. 1:6). In Job 22:14, "in the circuit of heaven" (R.V. marg., "on the vault of heaven") means the "arch of heaven," which seems to be bent over our heads.