the determination of the absolute age of earth materials, as by radiometric dating.

Origin of geochronometry

First recorded in 1920–25; geo- + chronometry
Related formsge·o·chron·o·met·ric [jee-oh-kron-uh-me-trik] /ˌdʒi oʊˌkrɒn əˈmɛ trɪk/, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

geochronometry in Science



The measurement of geologic time using absolute measures, such as radiometric dating, or relative measures, such as determining the sequence of deposition of rock strata.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.