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accelerograph

noun
ac·​cel·​ero·​graph | \ -rəˌgraf\
plural -s

Definition of accelerograph

1 : an apparatus for measuring and recording the pressure developed by combustion of an explosive in a closed space
2 : an instrument for recording the acceleration in velocity of earthquake vibrations

First Known Use of accelerograph

1875, in the meaning defined at sense 1

History and Etymology for accelerograph

borrowed from French accélérographe, from accéléro- (as in accéléromètre accelerometer + -graphe -graph

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