pneumonia/njuˈməʊniə/EtymologyFrom Ancient Greek πνευμονία (pneumonía, “lung disease”), from πνεύμων (pneúmōn, “lung”) + -ία (-ía).pneumonia means inflammation of the lungs caused by viruses, bacteria or other infectious microorganisms. Lexicurio rates it Rare gem — a strength score of 75 out of 100.nounInflammation of the lungs caused by viruses, bacteria or other infectious microorganisms.“He had always been remarkably immune from such little ailments, and had only once in his life been ill, of a vicious pneumonia long ago at school.”