¹ Source: wiktionary.com
Medical Definition of Leukocidin
1. A heat-labile substance that is elaborated by many strains of Staphylococcus aureus, Streptococcus pyogenes, and pneumococci and manifests a destructive action on leukocytes, with or without lysis of the cells. Origin: Leukocyte + L. Caedo, to kill (05 Mar 2000)