radiometric dating: Meaning and Definition of

ra'diomet'ric dat'ing

Pronunciation: [key]
  1. any method of determining the age of earth materials or objects of organic origin based on measurement of either short-lived radioactive elements or the amount of a long-lived radioactive element plus its decay product.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.