胸きょう水すいきょうすいFreq.FrequencyTop 100,000Meanings1nounpleural fluid; pleural effusionMedical term for fluid that accumulates in the pleural cavity. Used in clinical contexts.胸きょう水すいが溜たまると呼こ吸きゅうが苦くるしくなることがあります。When pleural fluid accumulates, it can cause difficulty breathing.