pulmonary emphysema

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun 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, most commonly tobacco smoke.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun an abnormal condition of the lungs marked by decreased respiratory function; associated with smoking or chronic bronchitis or old age