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electrocardiograph

noun [C]
 
 
/ɪˌlek.trəˈkɑː.di.ə.ɡræf/ /-ɡrɑːf/ US  /-ˈkɑːrdi.ə.ɡræf/ (abbreviation ECG) specialized

Definition

a machine that records the electrical activity of the heart as it beatsMedical and surgical equipment
(Definition of electrocardiograph noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of electrocardiograph