'Pneumococcus' definitions:

Definition of 'pneumococcus'

From: WordNet
noun
Bacterium causing pneumonia in mice and humans [syn: pneumococcus, Diplococcus pneumoniae]

Definition of 'Pneumococcus'

From: 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]