SINCE 1828
ionium
noun
io·ni·um
| \ ī-ˈō-nē-əm
\
\
Definition of ionium
: a natural radioactive isotope of thorium having a mass number of 230
Keep scrolling for more
Keep scrolling for more
More Definitions for ionium
ionium
noun
io·ni·um
| \ ī-ˈō-nē-əm
\
\
Medical Definition of ionium
: a natural radioactive isotope of thorium having a mass number of 230
Comments on ionium
What made you want to look up ionium? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
Finance Words Quiz
-
- The etymology of mortgage is related most closely to which two words?
Test your vocabulary with our 10-question quiz!
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Words at Play
Ask the Editors
Share ionium
Resources for ionium