(n) :
an abnormal accumulation of air in tissues , especially the lungs. Pulmonary emphysema is a chronic lung disease, characterised by an abnormal increase in the size of the air spaces, resulting in laboured breathing and caused by exposure to toxic chemicals such as tobacco smoke
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(n) :
an abnormal accumulation of air in tissues , especially the lungs. Pulmonary emphysema is a chronic lung disease, characterised by an abnormal increase in the size of the air spaces, resulting in laboured breathing and caused by exposure to toxic chemicals such as tobacco smoke