柯林斯詞典pneumococcus /?nju?m???k?k?s/ 1. N a spherical bacterium that occurs in the respiratory tract, esp the Gram-positive Diplococcus pneumoniae, which causes pneumonia 肺炎球菌 返回 pneumococcus劍橋詞典a bacteria that causes many infections in humans , including pneumonia , meningitis , and ear infections 肺炎球菌 返回 pneumococcus