potassium-argon
American Heritage Dictionary:
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po·tas·si·um-ar·gon
(pə-tăs'ē-əm-är'gŏn')
adj.
Of, relating to, or being a geologic dating method relying on the percentage of potassium in a specimen that has radioactively decayed to argon.
adj.
Of, relating to, or being a geologic dating method relying on the percentage of potassium in a specimen that has radioactively decayed to argon.
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American Heritage Dictionary
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
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