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radioiron

American  
[rey-dee-oh-ahy-ern] / ˌreɪ di oʊˈaɪ ərn /

noun

Chemistry.

  1. the radioactive isotope of iron, with atomic weight 59 and a half-life of 46 days: used chiefly as a tracer in biochemistry.

Etymology

Origin of radioiron

First recorded in 1955–60; radio- + iron

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.