An electrical switch, in a generator or motor, that periodically reverses the direction of an electric current.

plural of commutator

plural of commutation

(transitive, electronics) To reverse the direction of (a current). / (transitive, electronics) To convert from being or using an alternating current into being or using a direct current.

(algebra, logic) The subset of all elements of a semigroup that commute with the elements of a given subset

plural of commutant

Capable of being commuted.

plural of commutability

The quality of being commutable.

The quality of being commutable or interchangeable.