cardiograph (n.)youdaoicibaDictYouDict[cardiograph 词源字典]
1867, from cardio- + -graph "something written."
Although the work does not treat of the recent means of diagnosis--the thermometer, laryngoscope, cardiograph, etc.,--still it is complete as far as it goes. [book review in "Medical Investigator," May 1867, p.94]
[cardiograph etymology, cardiograph origin, 英语词源]