-LYSIS Meaning of -LYSIS in English [-lysis] n comb form, pl -lyses [NL, fr. L & Gk; L, loosening, fr. Gk, fr. lysis] 1: decomposition "electrolysis" 2: disintegration: breaking down "autolysis" Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012