ˈlīsə̇s noun
( plural ly·ses -īˌsēz)
Etymology: New Latin, from Greek, act of loosing, loosening, dissolution, remission of fever — more at lys-
1. : the gradual decline of a disease process : defervescence ; specifically : the gradual lowering of fever — compare crisis
2. : a process of disintegration or dissolution (as of bacteria or blood cells)