radiometric
adjective
ra·dio·met·ric
ˌrā-dē-ō-ˈme-trik 
1
: relating to, using, or measured by a radiometer
2
: of or relating to the measurement of geologic time by means of the rate of disintegration of radioactive elements
Examples of radiometric in a Sentence
Recent Examples on the Web
The team also used radiometric dating — or measuring the decay of certain elements in rocks to determine their ages — on sand grains from sandstone in the Naashoibito Member.
—
Ashley Strickland, CNN Money, 23 Oct. 2025
With the field geology evidence disputed, the other pillar holding up the 3.95-billion-year-old date is its radiometric date, measured in zircon crystals extracted from the rocks surrounding the metamorphosed siltstone.
—Howard Lee, ArsTechnica, 11 Aug. 2025
Precise radiometric dating has shown these to be the oldest solid objects to arise around the sun, suggesting CAIs may be the primordial seeds from which future planets would grow.
—Lee Billings, Scientific American, 15 July 2025
Once the data has been extracted from the rocks using these two methods, researchers then attempt to use that data to come to a radiometric date.
—Stephanie Edwards, Discover Magazine, 27 June 2025
To establish the age of these rocks, the researchers combined petrology and geochemistry and applied two radiometric dating methods using different isotopes of the elements samarium and neodymium.
—David Bressan, Forbes.com, 27 June 2025
Geologists use the ratio of these two elements like a radiometric clock to determine how old something is.
—Briana Pobiner, The Conversation, 11 Apr. 2025
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Ashley Strickland, CNN Money, 23 Oct. 2025
With the field geology evidence disputed, the other pillar holding up the 3.95-billion-year-old date is its radiometric date, measured in zircon crystals extracted from the rocks surrounding the metamorphosed siltstone.
—Howard Lee, ArsTechnica, 11 Aug. 2025
Precise radiometric dating has shown these to be the oldest solid objects to arise around the sun, suggesting CAIs may be the primordial seeds from which future planets would grow.
—Lee Billings, Scientific American, 15 July 2025
Once the data has been extracted from the rocks using these two methods, researchers then attempt to use that data to come to a radiometric date.
—Stephanie Edwards, Discover Magazine, 27 June 2025
To establish the age of these rocks, the researchers combined petrology and geochemistry and applied two radiometric dating methods using different isotopes of the elements samarium and neodymium.
—David Bressan, Forbes.com, 27 June 2025
Geologists use the ratio of these two elements like a radiometric clock to determine how old something is.
—Briana Pobiner, The Conversation, 11 Apr. 2025
Cite this Entry
“Radiometric.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/radiometric. Accessed 31 Oct. 2025.
Copy CitationMedical Definition
radiometric
adjective
ra·dio·met·ric
ˌrād-ē-ō-ˈme-trik
: relating to, using, or measured by a radiometer
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