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Meaning of amino-acid dating

a•mi'no-ac'id dat"ing

Pronunciation: (u-mē'nō as'id, am'u-nō"-), [key]
  1. a method used to date an organic geological or archaeological specimen, as a fossil or mummified body, by determining how much change has occurred in the amino-acid structure of that specimen.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.