tumor

noun
tu·​mor | \ ˈtü-mər , ˈtyü-\

Definition of tumor

1 : an abnormal benign or malignant new growth of tissue that possesses no physiological function and arises from uncontrolled usually rapid cellular proliferation

called also neoplasm

2 : a swollen or distended part … houses that bulged with the tumors and warts of … ornamental architecture …— W. A. White

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Other Words from tumor

tumoral \ ˈtü-​mə-​rəl , ˈtyü-​ \ adjective
tumorlike \ ˈtü-​mər-​ˌlīk , ˈtyü-​ \ adjective

Examples of tumor in a Sentence

the scan showed a small tumor in her abdomen

Recent Examples on the Web

Like a lot of early radiation and X-ray pioneers, Franklin developed tumors thanks to her constant high-intensity exposure. Avery Thompson, Popular Mechanics, "Europe's Next Mars Rover Is Named After a Pioneer of DNA Research," 7 Feb. 2019 Xalkori’s approval gave Pfizer a head start studying patients whose tumors became resistant to the drug, according to company officials and Dr. Shaw. Jared S. Hopkins, WSJ, "Pfizer Pivots to Cancer Drugs for Growth," 27 Jan. 2019 The process of digesting and metabolizing cabbage essentially unleashes a chemoprotective effect in the body, helping stop the enzymatic reactions linked to DNA damage — the type that can, over time, lead to tumor development. Jaclyn London, Ms, Rd, Cdn, Good Housekeeping, "Fact: Cabbage Packs the Same Nutritional Benefits as Kale," 7 Jan. 2019 Spotting shots and tumors Take the ShotSpotter system used by New York City and Washington, DC. Dan Rosenbaum, Ars Technica, "All hail the AI overlord: Smart cities and the AI Internet of Things," 7 Dec. 2018 There was always another chemo drug, another tumor marker test, another PET scan. Lori Segal, Allure, "My Mom's Breast Cancer Story Doesn't Have a Happy Ending," 11 Oct. 2018 That, in turn, allows typical anti-tumor immune responses to proceed. Esther Landhuis, Scientific American, "Could Brain Stimulation Slow Cancer?," 13 July 2018 Shifrel’s 13-year-old grandson Dylan was born with an inoperable brain tumor and underwent 20 months of chemotherapy. Krislyn Placide, Sun-Sentinel.com, "Former Miami Dolphin Kim Bokamper 'arrested' during annual Jail & Bail," 11 July 2018 No tumors, and while my spine was not in great shape, it could not be blamed for the numbing in my feet. Lynn Peterson Mobley, Washington Post, "My athletic husband stumbled. He was tired. He had a disease we’d never heard of.," 8 July 2018

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

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First Known Use of tumor

15th century, in the meaning defined at sense 2

History and Etymology for tumor

Middle English tumour, from Latin tumor, from tumēre

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Statistics for tumor

Last Updated

15 Feb 2019

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Time Traveler for tumor

The first known use of tumor was in the 15th century

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More Definitions for tumor

tumor

noun

English Language Learners Definition of tumor

: a mass of tissue found in or on the body that is made up of abnormal cells

tumor

noun
tu·​mor | \ ˈtü-mər , ˈtyü-\

Kids Definition of tumor

: an abnormal growth of body tissue

tumor

noun
tu·​mor
variants: or chiefly British tumour \ ˈt(y)ü-​mər \

Medical Definition of tumor

: an abnormal benign or malignant new growth of tissue that possesses no physiological function and arises from uncontrolled usually rapid cellular proliferation — see cancer sense 1, carcinoma, sarcoma

Other Words from tumor

tumorlike \ -​ˌlīk \ adjective

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More from Merriam-Webster on tumor

Rhyming Dictionary: Words that rhyme with tumor

Thesaurus: All synonyms and antonyms for tumor

Spanish Central: Translation of tumor

Nglish: Translation of tumor for Spanish Speakers

Britannica English: Translation of tumor for Arabic Speakers

Britannica.com: Encyclopedia article about tumor

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