or i·so·seis·mal

[ ahy-suh-sahyz-mik, -sahys- ]
/ ˌaɪ səˈsaɪz mɪk, -ˈsaɪs- /

adjective Geology.

noting or pertaining to equal intensity of earthquake shock.
noting or pertaining to an imaginary line on the earth's surface connecting points characterized by such intensity.


an isoseismic line.

Origin of isoseismic Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for isoseismal

British Dictionary definitions for isoseismal

/ (ˌaɪsəʊˈsaɪzməl) /


of or relating to equal intensity of earthquake shock


a line on a map connecting points at which earthquake shocks are of equal intensity
Systematic name: isoseismic
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