polyphase(a = adj.pert) multiphase - of an electrical system that uses or generates two or more alternating voltages of the same frequency but differing in phase angle;
Having or producing two or more phases; multiphase; as, a polyphase machine, a machine producing two or more pressure waves of electro-motive force, differing in phase; a polyphase current. [Webster 1913 Suppl.]
polyphase, adj. Electr. (of a device or circuit) designed to supply or use simultaneously several alternating currents of the same voltage but with different phases.