radiothorium

noun
ra·dio·tho·ri·um | \ˌrā-dē-ō-ˈthȯr-ē-əm \

Definition of radiothorium 

: a radioactive isotope of thorium with the mass number 228

First Known Use of radiothorium

1905, in the meaning defined above

History and Etymology for radiothorium

New Latin

Keep scrolling for more

Learn More about radiothorium

Share radiothorium

Statistics for radiothorium

Look-up Popularity

Time Traveler for radiothorium

The first known use of radiothorium was in 1905

See more words from the same year

Keep scrolling for more

More Definitions for radiothorium

radiothorium

noun
ra·dio·tho·ri·um | \-ˈthōr-ē-əm, -ˈthȯr- \

Medical Definition of radiothorium 

: a radioactive isotope of thorium with the mass number 228

More from Merriam-Webster on radiothorium

Britannica.com: Encyclopedia article about radiothorium

Comments on radiothorium

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

WORD OF THE DAY

required by fashion, etiquette, or custom

Get Word of the Day daily email!

Test Your Vocabulary

Great Scrabble Words—A Quiz

  • scrabble-tiles-that-read-scrabble-quiz
  • Which of the following Q-without-U words means the number five in cards or dice?
True or False

Test your knowledge - and maybe learn something along the way.

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!