Definition: 'Lung Unit'
lung unitType: Term
1. a respiratory bronchiole together with the alveolar ducts and sacs and pulmonary alveoli into which the respiratory bronchiole leads;
2. considered by some to include the terminal bronchiole and its subdivisions, and called a pulmonary acinus.
The definition information for lung unit is provided by Stedman's. You can search our medical dictionary here.