In an operant manner

(mathematics) Of or pertaining to operads.

(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 freight operating company

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.

The key word in a sentence.

Alternative form of nonoperational

(calculus) The study of calculus from the perspective of the theory of operators.