polyphase adjective. 
['pɒlɪfeɪz] L19.[from POLY- + PHASE noun.]1.  Electricity. Using two, three, or more alternating currents that are identical in frequency but differ in phase. 
L19.2.  Consisting of or occurring in a number of separate stages. 
M20.3.  Consisting of or involving a number of different phases of matter. 
M20. ■   poly'phasic adjective (
Physiology) having several successive peaks of activity etc. 
E20.  [TahlilGaran] English Dictionary ▲