胸きょう膜まくきょうまくMeanings1nounpleuraanatomyAnatomical term for the serous membrane covering the lungs and lining the thoracic cavity.胸きょう膜まくは肺はいを包つつむ薄うすい膜まくです。The pleura is a thin membrane that envelops the lungs.胸きょう膜まく炎えんは胸きょう膜まくの炎えん症しょうです。Pleurisy is inflammation of the pleura.