pneumatograph
Pneu*mat"o*graph, n. Etym: [Pneumato- + -graph.] (Physiol.) Defn: An instrument for recording the movements of the thorax or chest wall during respiration; -- also called stethograph.
Pneu*mat"o*graph, n. Etym: [Pneumato- + -graph.] (Physiol.) Defn: An instrument for recording the movements of the thorax or chest wall during respiration; -- also called stethograph.