trans·​ura·​nic | \ ˌtran(t)-syu̇-ˈra-nik How to pronounce transuranic (audio) , -shə-, -ˈrā-; ˌtran-zyu̇-, -zhə- \
variants: or transuranium \ ˌtran(t)-​syu̇-​ˈrā-​nē-​əm How to pronounce transuranium (audio) , -​shə-​ , -​ˈrā-​ ; ˌtran-​zyu̇-​ , -​zhə-​ \

Definition of transuranic

 (Entry 1 of 2)

: of, relating to, or being an element with an atomic number greater than that of uranium



Definition of transuranic (Entry 2 of 2)

: a transuranic element

Examples of transuranic in a Sentence

Recent Examples on the Web: Adjective So Bormanis came up with his own fictional heavy element, dysonium (named in honor of physicist Freeman Dyson), something with an atomic weight in the 130-135 range—well above the transuranic elements in the period table. Jennifer Ouellette, Ars Technica, "The Orville blends science fiction and science fact into a winning mix," 29 Dec. 2018 The excavator was digging up transuranic waste — which is waste contaminated with highly radioactive elements. Rebecca Boone, The Seattle Times, "Cleanup at Idaho nuclear landfill on hold after pit collapse," 18 May 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'transuranic.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of transuranic


1935, in the meaning defined above


1950, in the meaning defined above

Keep scrolling for more

Learn More about transuranic

Time Traveler for transuranic

Time Traveler

The first known use of transuranic was in 1935

See more words from the same year

Statistics for transuranic

Cite this Entry

“Transuranic.” Dictionary, Merriam-Webster, Accessed 4 Dec. 2020.

Comments on transuranic

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


Test Your Vocabulary

Musical Words Quiz

  • gramophone
  • Which word describes a musical performance marked by the absence of instrumental accompaniment?
Spell It

Can you spell these 10 commonly misspelled words?

Syn City

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

Love words? Need even more definitions?

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