diffusing capacity of lungs

Also found in: Dictionary, Thesaurus, Encyclopedia.
Related to diffusing capacity of lungs: single breath test

diffusing capacity of lungs (DL)

the volume of a gas that diffuses from the lung across the alveolar-capillary membrane into the bloodstream per minute per mm Hg difference in pressure across the membrane. The normal DL for oxygen averages 20 mL/min/mm Hg. Also called transfer factor of lungs.