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radiosodium

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

noun

Chemistry.

  1. 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.

Etymology

Origin of radiosodium

First recorded in 1930–35; radio- + sodium

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

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.

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