or co·seis·mic

[koh-sahyz-muh l, -sahys-]
  1. of, relating to, or being in a line, curve, etc., connecting or comprising points on the earth's surface at which an earthquake wave arrives simultaneously.

Origin of coseismal

First recorded in 1850–55; co- + seismal Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for coseismal

Historical Examples of coseismal

British Dictionary definitions for coseismal



  1. of or designating points at which earthquake waves are felt at the same time
  2. (of a line on a map) connecting such points
  1. such a line on a map
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