1.
[syn: seismic, seismal]
The Collaborative International Dictionary of English v.0.48:
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]
WordNet (r) 3.0 (2006):
seismic
adj 1: subject to or caused by an earthquake or earth vibration
[syn: seismic, seismal]