phonocardiogram

noun
pho·no·car·dio·gram | \ˌfō-nə-ˈkär-dē-ə-ˌgram \

Definition of phonocardiogram 

: a graphic representation of heart sounds made by means of a microphone, amplifier, and recording equipment

First Known Use of phonocardiogram

1911, in the meaning defined above

History and Etymology for phonocardiogram

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The first known use of phonocardiogram was in 1911

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phonocardiogram

noun
pho·no·car·dio·gram | \ˌfō-nə-ˈkärd-ē-ə-ˌgram \

Medical Definition of phonocardiogram 

: a graphic record of heart sounds made by means of a phonocardiograph

More from Merriam-Webster on phonocardiogram

Britannica.com: Encyclopedia article about phonocardiogram

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