Seismic - Dictionary Definition and Overview

Seismic :  adj : subject to or caused by an earthquake or earth vibration [syn: seismal]

Based on WordNet 2.0

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.

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.

Based on WordNet (r) 2.0 (August 2003)
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