phonocardiogram

noun

pho·​no·​car·​dio·​gram ˌfō-nə-ˈkär-dē-ə-ˌgram 

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

Word History

Etymology

borrowed from German Phonokardiogramm, from phono- phono- + Kardiogramm cardiogram

First Known Use

1911, in the meaning defined above

Medical Definition

phonocardiogram

noun

pho·​no·​car·​dio·​gram ˌfō-nə-ˈkärd-ē-ə-ˌgram 

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