[f. Gr. ἀναπνοή respiration (f. ἀνά again + πνέ-ειν to breathe) + -γραφ-ος writing.] An instrument for registering the movements and amount of expiration and inspiration.
1870. S. Gee, Auscult. & Percuss., ii. § 2 ¶ 1. Whether the anapnograph will be more useful remains to be seen.
