radiometric dating

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radiometric dating

n.
A method for determining the age of an object based on the concentration of a particular radioactive isotope contained within it and the half-life of that isotope.
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.

radiometric dating

n
(Archaeology) any method of dating material based on the decay of its constituent radioactive atoms, such as potassium-argon dating or rubidium-strontium dating. Also called: radioactive dating
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

ra′diomet′ric dat′ing


n.
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.
[1965–70]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

ra·di·o·met·ric dating

(rā′dē-ō-mĕt′rĭk)
A method for determining the age of an object based on the concentration of a particular radioactive isotope contained within it. The amount of the isotope in the object is compared to the amount of the isotope's decay products. The object's approximate age can then be figured out using the known rate of decay of the isotope. Radiocarbon dating is one kind of radiometric dating, used for determining the age of organic remains that are less than 50,000 years old. For inorganic matter and for older materials, isotopes of other elements, such as potassium, uranium, and strontium, are used.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

radiometric dating

Dating rocks by the known rate of decay of radioactive elements that they contain.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
References in periodicals archive ?
A strict interpretation of the age of this deposit through isotopic dating was not pursued because of limited material and the physiochemical nature of the tufa itself.
Using a technique known as argon isotopic dating, the researchers found that the samples range in age from about 28 million years to about 12 million years.