Definition of microseismometer in English:

microseismometer

Pronunciation /ˌmʌɪkrə(ʊ)sʌɪzˈmɒmɪtə/

noun

rare Geology
  • An instrument for detecting or measuring weak earth tremors.

Origin

Late 19th century; earliest use found in Encyclopaedia Britannica. From micro- + seismometer.