Pneumococcus

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Pneumococcus \Pneu`mo*coc"cus\, n. [See {Pneumo-}, and
     {Coccus}.] (Biol.)
     A form of micrococcus found in the sputum (and elsewhere) of
     persons suffering with pneumonia, and thought to be the cause
     of this disease.
     [1913 Webster]



From WordNet (r) 2.0 [wn]:

  pneumococcus
       n : bacterium causing pneumonia in mice and humans [syn: {Diplococcus
           pneumoniae}]
       [also: {pneumococci} (pl)]