phonautograph

noun phon·au·to·graph \fōˈnȯtəˌgraf, -rȧf\

Definition of phonautograph

  1. :  an instrument by which a sound can be made to produce a visible record of itself

phonautographic

adjective

phonautographically

\-fə̇k(ə)lē\ adverb

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Origin and Etymology of phonautograph

phon- + aut- + -graph


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a rounded knoll or a ridge of ice

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