Specific antibody that combines with bacterial cells ( i.e., antigen) and, in the presence of complement, causes lysis or dissolution of the cells.
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bac·te·ri·o·ly·sin bak-.tir-ē-ə-'līs-ən n an antibody that acts to destroy a bacterium
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n.
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bac·te·ri·ol·y·sin (bak-tēr″e-olґĭ-sin) an antibacterial antibody that produces lysis of bacterial cells.Medical dictionary. 2011.