electrocardiograph
elect·ro·car·diograph
noun
1.
medical instrument that records electric currents associated with contractions of the heart
Origin
From electro- + cardio- + -graph.
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WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.