radioelement

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

noun Chemistry.

a radioactive element.

Origin of radioelement

First recorded in 1900–05; radio- + element

British Dictionary definitions for radioelement

radioelement
/ (ˌreɪdɪəʊˈɛlɪmənt) /

noun

an element that is naturally radioactive