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Definition of: pneumococcus
(n
′mə·kok′əs, ny′-) noun plural ·coc·ci (-kok′sī)
Any of a group of bacteria that cause a common type of pneumonia and some other diseases.
—pneu′mo·coc′cal, pneu′mo·coc′·cous, pneu′mo·coc′cic (kok′sik) adjective
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