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 ]