Pneumococcus
Pronunciation : Pneu`mo*coc"cus
Part of Speech : n.
Etymology : [See Pneumo-, and Coccus.] (Biol.)
Definition : Defn: A form of micrococcus found in the sputum (and elsewhere) of persons suffering with pneumonia, and thought to be the cause of this disease.
Source : Webster's Unabridged Dictionary, 1913