a. [ Cf. Gr. &unr_; a shaking up and down. ] Moving up and down; -- said of earthquake shocks. [ Webster 1913 Suppl. ]
n. [ Micro- + Gr. &unr_; an earthquake, fr. &unr_; to shake. ] A feeble earth tremor not directly perceptible, but detected only by means of specially constructed apparatus. --
n. [ Microseiem + -graph. ] A microseismometer; specif., a microseismometer producing a graphic record. [ Webster 1913 Suppl. ]
n. [ Microseiem + -logy. ] Science or study of microseisms. [ Webster 1913 Suppl. ]
n. [ Microseism + -meter. ] A seismometer for measuring amplitudes or periods, or both, of microseisms. --
Seismic vertical,
n. [ Gr. &unr_; earthquake + -gram. ] (Physics) The trace or record of an earth tremor, made by means of a seismograph. [ Webster 1913 Suppl. ]
n. [ Gr. &unr_;&unr_;&unr_; an earthquake + -graph. ] (Physics) An apparatus for registering the shocks and undulatory motions of earthquakes. [ 1913 Webster ]
a. Of or pertaining to a seismograph; indicated by a seismograph. [ 1913 Webster ]
n.
a. Of or pertaining to seismology. --
n. [ Gr. &unr_;&unr_;&unr_; an earthquake + -logy. ] The science of earthquakes. [ 1913 Webster ]
n. [ Gr. &unr_;&unr_;&unr_; an earthquake + -meter. ] (Physics) An instrument for measuring the direction, duration, and force of earthquakes and like concussions. [ 1913 Webster ]
a. Of or pertaining to seismometry, or seismometer;
n. The mensuration of such phenomena of earthquakes as can be expressed in numbers, or by their relation to the coordinates of space. [ 1913 Webster ]
n. [ Gr. &unr_;&unr_;&unr_; an earthquake + -scope. ] (Physics) A seismometer. [ 1913 Webster ]
n. [ Gr.