tumor

noun
tu·​mor | \ ˈtü-mər How to pronounce tumor (audio) , 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 How to pronounce tumoral (audio) , ˈtyü-​ \ adjective
tumorlike \ ˈtü-​mər-​ˌlīk How to pronounce tumorlike (audio) , ˈtyü-​ \ adjective

Examples of tumor in a Sentence

the scan showed a small tumor in her abdomen

Recent Examples on the Web

During Foy’s last year, a tumor was found behind one of her eyes. Nathan Heller, Vogue, "Claire Foy on Becoming a Mother and Trading Her Crown for a Dragon Tattoo," 10 Oct. 2018 When a brain tumor is found, treatment may include surgery, chemotherapy and/or radiation. The Seattle Times, "Proton beams destroy brain tumors and give kids a chance," 13 Sep. 2018 Cancer survival rates soar when tumors are detected in their earliest stages, the researchers said in background notes. Dennis Thompson, chicagotribune.com, "Blood test shows promise in detecting lung cancer," 5 June 2018 The patients’ tumors were analyzed using a test called Oncotype DX, which examines the activity of 21 genes to predict the risk of a recurrence over 10 years. Laurie Mcginley, Washington Post, "Most women with a common type of early-stage breast cancer can skip chemo, a new report finds," 3 June 2018 The patients’ tumors were analyzed using a test called Oncotype DX, which examines the activity of 21 genes to predict the risk of a recurrence over 10 years. Laurie Mcginley, BostonGlobe.com, "Study finds some with early-stage breast cancer can skip chemotherapy," 3 June 2018 The Connecticut biotech’s drugs target highly specific genetic mutations found in cancer cells, regardless of where in the body the tumor is located. Adam Feuerstein, STAT, "Loxo Oncology shows high tumor response rates with second genetically targeted cancer drug," 2 June 2018 Because these cells have a steady blood supply and tend to reproduce rapidly, these tumors are often malignant. Shari Rudavsky, Indianapolis Star, "Glioblastoma: What to know about the deadly cancer confronting John McCain and Susan Bayh," 22 May 2018 The cancer spread from his leg, where a tumor was first discovered, to his lungs. Phil Anastasia, Philly.com, "Washington Nationals pitcher Sean Doolittle has special bond with Shawnee's Danny Hill," 5 May 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

12 Apr 2019

Look-up Popularity

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 How to pronounce tumor (audio) , ˈtyü-\

Kids Definition of tumor

: an abnormal growth of body tissue

tumor

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

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 How to pronounce tumorlike (audio) \ 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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