from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Relating to or designating a line connecting the points on a map that indicate the places simultaneously affected by an earthquake shock.
- n. A coseismal line.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Of or pertaining to a line on a map connecting places simultaneously affected by a seismic event.
from The Century Dictionary and Cyclopedia
- The term used by Mallet to designate the curve or line along which a wave of earthquake-shock “simultaneously [synchronously] reaches the earth's surface”; the crest of a wave of shock. See homoseismal, isochrone, isoseismal.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. being where earthquake waves arrive simultaneously
Sorry, no etymologies found.