cardiograph
oxford
views updated May 29 2018car·di·o·graph / ˈkärdēəˌgraf/ •
n. an instrument for recording heart muscle activity, such as an electrocardiograph.DERIVATIVES: car·di·og·ra·pher / ˌkärdēˈägrəfər/ n.car·di·og·ra·phy / -ˈägrəfē/ n.
The Oxford Pocket Dictionary of Current English