antiatom

noun
an·​ti·​atom

Definition of antiatom

: an atom comprised of antiparticles

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

First Known Use of antiatom

1959, in the meaning defined above

History and Etymology for antiatom

anti- entry 1 + atom

Keep scrolling for more

Learn More About antiatom

Time Traveler for antiatom

Time Traveler

The first known use of antiatom was in 1959

See more words from the same year

Dictionary Entries Near antiatom

anti-asthma

antiatom

antiauthoritarian

See More Nearby Entries 

Statistics for antiatom

Cite this Entry

“Antiatom.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/antiatom. Accessed 20 Sep. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

WORD OF THE DAY

Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
 AlphaBear 2

Spell words. Make bears.

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!