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- n. A method of estimating the age of igneous rocks or of archaeological objects by measuring the amount of argon that has built up through the radioactive decay of potassium.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. geological dating that relies on the proportions of radioactive potassium in a rock sample and its decay product, argon
Sorry, no etymologies found.