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co·seis·mal(kō-sīz′məl, -sīs′-) also co·seis·mic (-mĭk)
Relating to or designating a line connecting the points on a map that indicate the places simultaneously affected by an earthquake shock.
A coseismal line.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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|Adj.||1.||coseismic - being where earthquake waves arrive simultaneously|
unstable - lacking stability or fixity or firmness; "unstable political conditions"; "the tower proved to be unstable in the high wind"; "an unstable world economy"
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