a combining form meaning “earthquake,” used in the formation of compound words: seismograph.

Origin of seismo-

see origin at seism, -o- Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for seismo-


before a vowel seism-

combining form


Word Origin for seismo-

from Greek seismos
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for seismo-

word-forming element meaning "earthquake," from comb. form of Greek seismos "a shaking, shock; an earthquake," from seiein "to shake," from PIE root *twei- "to agitate, shake, toss."

Online Etymology Dictionary, © 2010 Douglas Harper