ionium

play
noun io·ni·um \ī-ˈō-nē-əm\

Definition of ionium

  1. :  a natural radioactive isotope of thorium having a mass number of 230

Origin and Etymology of ionium

ion; from its ionizing action


Medical Dictionary

ionium

play
noun io·ni·um \ī-ˈō-nē-əm\

Medical Definition of ionium

  1. :  a natural radioactive isotope of thorium having a mass number of 230


Learn More about ionium


Seen and Heard

What made you want to look up ionium? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

to plunder or ravage

Get Word of the Day daily email!

Test Your Vocabulary

Time Traveler Quiz: Which Word Came First?

  • time-traveler-quiz-which-word-came-first
  • Which came first?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!