tu·​mor·​ous | \ ˈtü-mə-rəs How to pronounce tumorous (audio) , ˈtyü-; ˈtüm-rəs, ˈtyüm-\

Definition of tumorous

: of, relating to, or resembling a tumor tumorous cells a tumorous growth

Examples of tumorous in a Sentence

Recent Examples on the Web

Scheerer continues treatment, including chemotherapy, surgeries to remove tumorous sections and radiation as well as clinical trials at Johns Hopkins Hospital and the National Institute of Health’s National Cancer Institute. Andrew Michaels, Howard County Times, "Families affected by cancer spend 'Sundays at the Park' with Orioles," 21 Sep. 2017 Researchers caught the little jerks hiding out among cancer cells, gobbling up chemotherapy drugs intended to demolish their tumorous digs. Beth Mole, Ars Technica, "See jerkface bacteria hiding in tumors and gobbling chemotherapy drugs," 17 Sep. 2017

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

First Known Use of tumorous

1547, in the meaning defined above

Keep scrolling for more

Learn More about tumorous

Statistics for tumorous

Look-up Popularity

Time Traveler for tumorous

The first known use of tumorous was in 1547

See more words from the same year

Keep scrolling for more

More Definitions for tumorous


tu·​mor·​ous | \ ˈt(y)üm-(ə-)rəs How to pronounce tumorous (audio) \

Medical Definition of tumorous

: of, relating to, or resembling a tumor a tumorous disease

More from Merriam-Webster on tumorous

Rhyming Dictionary: Words that rhyme with tumorous

Comments on tumorous

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


to wander slowly or to speak indistinctly

Get Word of the Day daily email!

Test Your Vocabulary

Where in the World? A Quiz

  • peter bruegel tower of babel painting
  • What language does pajama come from?
Spell It

Can you spell these 10 commonly misspelled words?

Add Diction

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!