肺炎双球菌 fèiyánshuāngqiújūn pneumococcus Origin Definitions Defs Strokes Stroke Words Sentences Sents 肺炎 fèiyán noun pneumonia pneumonia; inflammation of the lungs caused by bacteria, viruses, or irritants双球菌 雙球菌 shuāngqiújūn diplococcus A type of bacteria that occurs in pairs; many species cause diseases such as pneumonia, meningitis, and gonorrhea.