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Definition of Anatomic dead space
1. Noun. (context: anatomy) That volume of conducting airways of the lung, as measured by a cast of the airways. ¹
2. Noun. (context: physiology) That volume of inspired gas that does not mix with alveolar gas, as measured in vivo by gas dilution, by the method of Fowler. ¹
¹ Source: wiktionary.com