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. 1. A writing about, or a description of, earthquakes. [ 1913 Webster ]
2. The art of registering the shocks and undulatory movements of earthquakes. [ 1913 Webster ]