noun Date: 1913 an instrument for recording the changes of electrical potential occurring during the heartbeat used especially in diagnosing abnormalities of heart action, ~ic adjective ~ically adverb ~y noun
ELECTROCARDIOGRAPH
Meaning of ELECTROCARDIOGRAPH in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012