n. a substance capable of bringing about destruction of red blood cells (*haemolysis). It may be an antibody or a bacterial toxin.
n. a specific *complement-fixing antibody that is capable of bringing about the destruction (lysis) of whole cells. Names are given to varieties of lysin with different targets; for example, haemolysin attacks red blood cells; leucolysin attacks white cells; and a bacteriolysin targets bacterial cells.... lysin
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