'Seismic' definitions:
Definition of 'seismic'
From: WordNet
adjective
Subject to or caused by an earthquake or earth vibration [syn: seismic, seismal]
Definition of 'Seismic'
From: GCIDE
- Seismic \Seis"mic\, Seismal \Seis"mal\, a. [Gr. seismo`s an earthquake, from sei`ein to shake.] Of or pertaining to an earthquake; caused by an earthquake. [1913 Webster]
- Seismic vertical, the point upon the earth's surface vertically over the center of effort or focal point whence the earthquake's impulse proceeds, or the vertical line connecting these two points. [1913 Webster]