Origin of polyphase
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for polyphase
The type most commonly used is the polyphase induction motor.
Both carry conductors in their slots, and these conductors in each case form a polyphase winding.
For starting, a polyphase resistance completes the circuits of the rotor winding.
Mr. Tesla's work ranges far beyond the vast departments of polyphase currents and high potential lighting.The inventions, researches and writings of Nikola Tesla
Thomas Commerford Martin
Hence in many places preference is now given to the polyphase system.