D defs.my
Entry 1 sense Webster, 1913

Seismograph

· Seis·mo·graph · IPA /ˈsaɪz.mə.ɡɹæf/
01 n. An apparatus for registering the shocks and undulatory motions of earthquakes.
  1. 1.
    An apparatus for registering the shocks and undulatory motions of earthquakes.(Physics)