neoformation

noun

neo·​for·​ma·​tion -fȯr-ˈmā-shən How to pronounce neoformation (audio)
: a new growth
specifically : tumor
neoformative
-ˈfȯr-mət-iv How to pronounce neoformation (audio)
adjective

Browse Nearby Words

neoformation
See all Nearby Words

Cite this Entry

“Neoformation.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/neoformation. Accessed 13 Mar. 2025.

Copy Citation

Share

Love words? Need even more definitions?

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

Popular in Grammar & Usage

See More

How to Use Em Dashes (—), En Dashes (–) , and Hyphens (-)

'Affect' vs. 'Effect'

What's the difference between 'fascism' and 'socialism'?

More Commonly Misspelled Words

Words You Always Have to Look Up
See More

Popular in Wordplay

See More

13 Unusually Long English Words

9 Superb Owl Words

8 Words with Fascinating Histories

8 Words for Lesser-Known Musical Instruments

Birds Say the Darndest Things
See More

Popular Features

See More

How to Use Em Dashes (—), En Dashes (–) , and Hyphens (-)

13 Unusually Long English Words

9 Superb Owl Words
See More

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Word Game Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
Missing Letter A daily crossword with a twist
girl-pencil-test
Challenging Standardized Test Words Quiz Vol. 3 You’re on your own for the math section.
See All