radiosodium

American

[ray-dee-oh-soh-dee-uhm] / ˌreɪ di oʊˈsoʊ di əm /

noun

Chemistry.

the radioactive isotope of sodium having an atomic mass of 24 and a half-life of 14.9 hours: used as a tracer in biochemistry.

First recorded in 1930–35; radio- + sodium

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023