alveolar-arterial gas pressure difference

al·ve·o·lar-ar·te·ri·al gas pres·sure dif·fer·ence

(al-vēō-lăr ahr-tēŕē-ăl gas preshŭr difĕr-ĕns) Refers to the gap between the gas pressures in the alveoli (lungs) and circulatory system (capillaries).