Hypertext Webster Gateway: "seismic"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
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.
From WordNet (r) 1.7 (wn)
seismic
adj : subject to or caused by an earthquake or earth vibration
[syn: {seismal}]
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