po·​tas·​si·​um-ar·​gon pə-ˈta-sē-əm-ˈär-ˌgän How to pronounce potassium-argon (audio)
: being or relating to a method of dating paleontological or geologic materials based on the radioactive decay of potassium to argon that has taken place in a specimen

Word History

First Known Use

1953, in the meaning defined above

Time Traveler
The first known use of potassium-argon was in 1953

Dictionary Entries Near potassium-argon

Cite this Entry

“Potassium-argon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/potassium-argon. Accessed 27 Sep. 2023.

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