Seism
ahd-5
noun.
undefined
Wiktionary, Creative Commons Attribution/Share-Alike License
noun.
A
shaking
of the
Earth
's
surface
; an
earthquake
or
tremor
.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
shaking and vibration at the surface of the earth resulting from underground movement along a fault plane of from volcanic activity