An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

General: A substitution, exchange, or interchange.
Electronics: The transfer of current from one channel to another in a gas tube.
Electricity: The reversal of direct current into alternating current.
Math: A commutative operation, where a . b = b . a.

Noun from → commute.

The specification of commutators of operators that in quantum physics correspond to the coordinates and momenta of a system.

→ commutation; → rule.