1876, "putrefaction," from Modern Latin sepsis, from Greek sepsis "putrefaction," from sepein "to rot," of unknown origin.
sepsis sep·sis (sěp'sĭs)
n. pl. sep·ses (-sēz)
The presence of pathogenic organisms or their toxins in the blood or tissues.
The poisoned condition resulting from the presence of pathogens or their toxins.