epithelioma

noun

ep·i·the·li·o·ma ˌe-pə-ˌthē-lē-ˈō-mə

plural epitheliomas also epitheliomata ˌe-pə-ˌthē-lē-ˈō-mə-tə

: a tumor derived from epithelial tissue

epitheliomatous

ˌe-pə-ˌthē-lē-ˈō-mə-təs

adjective

Word History

First Known Use

1872, in the meaning defined above

Time Traveler

The first known use of epithelioma was in 1872

See more words from the same year

Cite this Entry

Style

“Epithelioma.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/epithelioma. Accessed 31 Oct. 2025.

Copy Citation

Medical Definition

epithelioma

noun

ep·i·the·li·o·ma -ˌthē-lē-ˈō-mə

plural epitheliomas also epitheliomata -mət-ə

: a benign or malignant tumor derived from epithelial tissue

epitheliomatous

-mət-əs

adjective

More from Merriam-Webster

Word of the Day

hobgoblin

See Definitions and Examples »

Get Word of the Day daily email!

Popular in Grammar & Usage

'Affect' vs. 'Effect'

Using Bullet Points ( • )

'A' or 'an'? What about before 'h'? An Indefinite Article Guide

The Difference Between 'i.e.' and 'e.g.'

What’s the difference between ‘cemetery’ and ‘graveyard’?

Popular in Wordplay

epithelioma

noun

Word History

Browse Nearby Words

Cite this Entry

Medical Definition

More from Merriam-Webster on epithelioma

More from Merriam-Webster

Can you solve 4 words at once?