Rhe"o*crat (?), n. [Gr. "rei^n to flow + kratei^n to rule.] (Elec.) A kind of motor speed controller permitting of very gradual variation in speed and of reverse. It is especially suitable for use with motor driven machine tools.

Rhe"o*crat (?), n. [Gr. "rei^n to flow + kratei^n to rule.] (Elec.) A kind of motor speed controller permitting of very gradual variation in speed and of reverse. It is especially suitable for use with motor driven machine tools.