plural of operational service period

plural of floating-point operation

(physics) A dual version of the Wilson loop in which the electromagnetic potential A is replaced by its electromagnetic dual Aᵐᵃᵍ, where the exterior derivative of A is equal to the Hodge dual of the exterior derivative of Aᵐᵃᵍ.

plural of 't Hooft operator

plural of train operating company

(UK, rail transport) A company that runs freight trains on the national railway network in Great Britain under license from the government.

(UK, rail transport) A company that operates passenger trains on the mainline railway network in Great Britain under franchise or license from the Government.

plural of freight operating company

(rail transport) The operation of a train without a conductor or guard as a cost-cutting measure; one-man operation.

(theology) From the work worked; referring to sacraments deriving their power from Christ's work rather than the role of humans, and thus not requiring faith to be effective.