1911, in the meaning defined above
borrowed from German Phonokardiogramm, from phono- phono- + Kardiogramm cardiogram
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Cite this Entry
“Phonocardiogram.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/phonocardiogram. Accessed 17 Jan. 2022.
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