肺はい切せつ除じょはいせつじょMeanings1nounpneumonectomy; lung resectionMedical term for surgical removal of all or part of a lung. Used in clinical contexts.肺はい切せつ除じょは肺はいがんの治ち療りょうとして行おこなわれることがあります。Pneumonectomy may be performed as a treatment for lung cancer.