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

In 2018, researchers from China's National Center for Nanoscience and Technology and Arizona State University created cancer-fighting nanobots designed to go inside a patient's body to target tumor cells. NBC News, "These 'microbristle' robots are so small they might work inside the human body," 29 July 2019 In 2017, three groups, including Kharas’s, independently showed that eliminating the enzyme that places m6A on mRNA kills tumor cells in acute myeloid leukemia. Ken Garber, Science | AAAS, "Hidden layer of gene control influences everything from cancer to memory," 1 July 2019 This result was dependent on cell type: In tumor cells that have no innate immunity, being aggregated was costly. Quanta Magazine, "Viruses Have a Secret, Altruistic Social Life," 15 Apr. 2019 Activity can help doctors distinguish between a rapidly growing tumor and a benign mass of cells. Julie Grisham, Scientific American, "Faster, clearer PET images offer new views on disease," 9 July 2019 So far the museum has completed dozens of labels for its extensive collection, which includes sections of brains, hearts, tumors and other biological remains. Jennifer Nalewicki, Smithsonian, "How One Museum Is Giving a Voice to Former Mental Health Patients," 2 July 2019 Kura is testing the drug for several forms of blood cancer, as well as solid tumors. San Diego Union-Tribune, "Kura Oncology reports lymphoma success with cancer drug," 17 June 2019 Studies are testing algorithms to read x-rays, detect brain bleeds, pinpoint tumors, and more. Jennifer Couzin-frankel, Science | AAAS, "Artificial intelligence could revolutionize medical care. But don’t trust it to read your x-ray just yet," 17 June 2019 The plan was to shrink the tumor and then have a second surgery to remove it and a portion of the pancreas. Joyce Rudolph, latimes.com, "Community: Longtime columnist goes through fight of her life," 3 June 2019

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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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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