radioelement

[ rey-dee-oh-el-uh-muhnt ]
/ ˌreɪ di oʊˈɛl ə mənt /

noun Chemistry.

a radioactive element.

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Origin of radioelement

First recorded in 1900–05; radio- + element
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for radioelement

radioelement
/ (ˌreɪdɪəʊˈɛlɪmənt) /

noun

an element that is naturally radioactive
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012