— epistatic /ep'euh stat"ik/ , adj.
/i pis"teuh sis/ , n. , pl. epistases /-seez'/ .
1. Genetics. a form of interaction between nonallelic genes in which one combination of such genes has a dominant effect over other combinations.
2. Med.
a. the stoppage of a secretion or discharge.
b. a scum that forms on a urine specimen upon standing.
[ 1915-20; epístasis stopping, stoppage. See EPI-, STASIS ]