say it: LAHY-sis
lysis is a noun meaning "recuperation in which the symptoms of an acute disease gradually subside". It carries 2 recorded senses.
recuperation in which the symptoms of an acute disease gradually subside
(biochemistry) dissolution or destruction of cells such as blood cells or bacteria
biochemistry
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for lysis come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.