‖n. [ From Coulomb, a French physicist and electrican. ] (Physics) The standard unit of quantity in electrical measurements. It is the quantity of electricity conveyed in one second by the current produced by an electro-motive force of one volt acting in a circuit having a resistance of one ohm, or the quantity transferred by one ampère in one second. Formerly called
(Elec.) Any instrument by which electricity can be measured in coulombs. [ Webster 1913 Suppl. ]
(Physics) The law that the force exerted between two electric or magnetic charges is directly proportional to the product of the charges and inversely to the square of the distance between them. [ Webster 1913 Suppl. ]