'Permulator' definitions:

Definition of 'Permulator'

From: GCIDE

Permulator \Per"mu*la`tor\, n. (Elec.) A special form of rotary converter with stationary commutator and rotating brushes, in which the exciting field is induced by the alternating current in a short-circuited magnetic core instead of being produced by an external magnet. [Webster 1913 Suppl.]