Definition of "coseismal" []

• Relating to or designating a line connecting the points on a map that indicate the places simultaneously affected by an earthquake shock. (adjective)
• A coseismal line. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "If, however, the number of observations is large for the size of the disturbed area, the construction of coseismal lines may define approximately the position of the epicentre."
• "There is thus an apparent increase in the velocity with the distance, but the accuracy of the coseismal lines is unequal to establishing this as a fact."
• "With evidence so abundant, a new method of drawing coseismal lines becomes possible."