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lysis

ly·sis [ lssiss ]


noun 
Definition:
 
1. destructive disruption of cells: the destruction of cells by disruption of the bounding membrane, allowing the cell contents to escape

2. gradual reduction of disease symptoms: a gradual reduction in severity of a patient's signs and symptoms during the course of a disease

[Mid-16th century. Via Latin, "loosening" < Greek lusis< luein "loosen"]
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