spi·ro·graph (spī'rə-grāf') n. An instrument for registering the depth and rapidity of respiratory movements. spi'ro·graph'ic adj., spi'ro·graph'i·cal·ly adv., spi·rog'ra·phy (spī-rŏg'rə-fē) n.
Main Entry: spi·ro·graph Pronunciation: 'spI-r&-"graf Function: noun : an instrument for recording respiratory movements —spi·ro·graph·ic/"spI-r&-'graf-ik/adjective