1945, in the meaning defined above
California University cyclotron
Time Traveler for calutron
See more words from the same year
Cite this Entry
“Calutron.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/calutron. Accessed 18 Aug. 2022.
More from Merriam-Webster on calutron
Britannica.com: Encyclopedia article about calutron
See Definitions and Examples »
Get Word of the Day daily email!
Challenging Words You Should Know
Test your vocabulary with our 10-question quiz!
A daily challenge for crossword fanatics.
Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!
As illustrated by some very smart pups
Bikini, bourbon, and badminton were places first
Do you take pride in Pride?
Look up any year to find out
How to use a word that (literally) drives some pe...
We're intent on clearing it up
Editor Emily Brewster clarifies the difference.
"The public is a hot mess"
Roll up your sleeves and identify these garments
Take the quiz
Can you tell a meerkat from a wombat?
Can you outdo past winners of the National Spelli...