WordReference Random House Unabridged Dictionary of American English © 2025
var•i•o•cou•pler
(vâr′ē ō kup′lər),USA pronunciation n. [Elect.]
- Electricitya transformer having coils with a self-impedance that is essentially constant but a mutual impedance that can be varied by moving one coil with respect to the other.
- vari(able) + -o- + coupler 1920–25