ra·​dio·​met·​ric ˌrā-dē-ō-ˈme-trik How to pronounce radiometric (audio)
: relating to, using, or measured by a radiometer
: of or relating to the measurement of geologic time by means of the rate of disintegration of radioactive elements
radiometrically adverb

Examples of radiometric in a Sentence

Recent Examples on the Web The only close radiometric date in marine rocks is from when life began to recover after the extinction. Howard Lee, Ars Technica, 8 Feb. 2023 The techniques produced 157 radiometric ages that were combined with eight sources of environmental and behavioral evidence. Laura Baisas, Popular Science, 10 Jan. 2024 Ruiz-Redondo and his team are awaiting a full laboratory analysis of Cova Dones’ motifs—including radiometric dating of their crusty mineral coverings—but until then, a couple of logical approaches provide some clarity. Sonja Anderson, Smithsonian Magazine, 5 Jan. 2024 Scientists have conducted radiometric dating on zircon fragments collected during the Apollo 14 mission, correcting the calculations for cosmic ray exposure, and determined that the lunar crust hardened approximately 4.51 billion years ago. Eva Botkin-Kowacki, Popular Science, 22 Jan. 2023 Absolute ages are derived typically through radiometric clocks, so using elements that decay like U, Th, C and K. Erik Klemetti, Discover Magazine, 31 May 2012 The other option is to use an objective dating method – radiometric rock dating, for instance – on bodies that have kept cleaner records than Earth. Korey Haynes, Discover Magazine, 15 Aug. 2019 The team sent a sample from the comb to the University of Oxford's radiometric laboratory, but the carbon was too poorly preserved to accurately date the sample. Jennifer Ouellette, Ars Technica, 10 Nov. 2022 Scientists, using radiometric dating, estimate the Earth itself is 4.5 billion years old. Isaac Skromne, The Conversation, 18 July 2022 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'radiometric.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


International Scientific Vocabulary

First Known Use

1877, in the meaning defined at sense 1

Time Traveler
The first known use of radiometric was in 1877

Dictionary Entries Near radiometric

Cite this Entry

“Radiometric.” Dictionary, Merriam-Webster, Accessed 29 Feb. 2024.

Medical Definition


ra·​dio·​met·​ric ˌrād-ē-ō-ˈme-trik How to pronounce radiometric (audio)
: relating to, using, or measured by a radiometer
radiometrically adverb
Last Updated: - Updated example sentences
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