Lysozyme wani nau'in enzyme ne da ake samu a cikin ruwayen jiki kamar hawaye, da yau, da gamsai. Babban aikinsa shi ne rushe bangon tantanin halitta na wasu nau'ikan kwayoyin cuta, yana sa su watse su mutu. Wannan yana taimakawa wajen kare jiki daga kamuwa da cuta ta hanyar hana haɓakar ƙwayoyin cuta masu cutarwa. Kalmar "lysozyme" ta fito ne daga kalmomin Helenanci "lysis," ma'anar rabuwa, da "zyme," ma'ana enzyme.