Emphysema
WordNet
noun
(1) An abnormal condition of the lungs marked by decreased respiratory function; associated with smoking or chronic bronchitis or old age
WiktionaryText
Noun
emphysema
- 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.