Definitions for radioactinium
radioactinium
ra·di·o·ac·tin·i·um
Spelling: [rey-dee-oh-ak-tin-ee-uh m]
IPA: /ˌreɪ di oʊ ækˈtɪn i əm/
Radioactinium is a 13 letter English word.
You can make 1276 anagrams from letters in radioactinium (aacdiiimnortu).
Definitions for radioactinium
noun
-
the radioactive isotope of thorium having a mass number 227 and a half-life of 18.8 days. Symbol: RdAc, Th 227.
Origin of radioactinium
First recorded in 1905-10; radio- + actinium