poly·pha·sic -'fā-zik adj
1) of, relating to, or having more than one phase <\polyphasic evoked potentials> compare DIPHASIC (b), MONOPHASIC (1)
2) having several periods of activity interrupted by intervening periods of rest in each 24 hours <an infant is essentially \polyphasic>
* * *
poly·pha·sic (pol″e-faґzik) having or existing in many phases; having unlike particles in the disperse phase.Medical dictionary. 2011.