accelerograph
/əkˈsɛlərə(ʊ)ɡrɑːf/ /əkˈsɛlərə(ʊ)ɡraf/ /akˈsɛlərə(ʊ)ɡrɑːf/noun
A device or apparatus for measuring and recording acceleration; specifically a seismograph for recording large earth tremors by this means.
Origin
Late 19th century. From accelero- + -graph, after French accélérographe.