9 letters · 11 points in Scrabble
noun the suppression of a gene by the effect of an unrelated gene
originBorrowed from Ancient Greek ἐπίστασις (epístasis, “stopping”), from ἐφίστημι (ephístēmi, “stop”), from ἐφ- (eph-) + ἵστημι (hístēmi, “make to stand”). The use in genetics was coined by English biologist William Bateson in 1909 in his book Mendel's Principles of Heredity.
Etymology from Wiktionary, CC BY-SA 3.0