seismographPronunciation: /ˈsʌɪzmə(ʊ)grɑːf/Translate seismograph | into Italian Definition of seismograph noun an instrument that measures and records details of earthquakes, such as force and duration. Derivatives seismographicPronunciation: /-ˈgrafɪk/ adjective seismographicalPronunciation: /-ˈgrafɪk(ə)l/ adjective seismograph in other Oxford dictionaries Definition of seismograph in the US English dictionary