pneumococcus
noun
pneu·mo·coc·cus
ˌnü-mə-ˈkä-kəs
ˌnyü-
plural pneumococci
ˌnü-mə-ˈkäk-ˌsī
-ˌsē;
-ˈkä-ˌkī,
-ˌkē,
ˌnyü-
: a bacterium (Streptococcus pneumoniae) that causes an acute pneumonia involving one or more lobes of the lung
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Merriam-Webster unabridged
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