ə̇ˈpistəsə̇s noun
( plural epista·ses -təˌsēz)
Etymology: New Latin, from Greek, act of stopping, stoppage, from ephistanai to set on, set over, stop, from epi- + histanai to place, set — more at stand
1. medicine
a. : suppression of a secretion or discharge
b. : a scum on the surface of urine
2. : suppression of the effect of a gene by a nonallelic gene
the role of epistasis in polygenic inheritance