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tumor

[too-mer, tyoo-]
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noun
  1. a swollen part; swelling; protuberance.
  2. an uncontrolled, abnormal, circumscribed growth of cells in any animal or plant tissue; neoplasm.
  3. Archaic.
    1. inflated pride; haughtiness.
    2. pompous language; bombast.
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Also especially British, tu·mour.

Origin of tumor

1535–45; < Latin: a swelling, swollen state, equivalent to tum(ēre) to swell + -or -or1
Related formstu·mor·like, adjectivetu·mor·ous, tu·mor·al, adjectivean·ti·tu·mor, adjective, nounan·ti·tu·mor·al, adjectivenon·tu·mor·ous, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words

cystlumpcancerswellingcarcinomabumpsarcomatumefactionneoplasm

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Word Origin and History for tumor

n.

1540s, from Latin tumor "swelling, condition of being swollen," from tumere "to swell" (see thigh).

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Online Etymology Dictionary, © 2010 Douglas Harper

tumor in Medicine

tumor

(tōōmər)
n.
  1. An abnormal growth of tissue resulting from uncontrolled, progressive multiplication of cells and serving no physiological function; a neoplasm.
  2. A swollen part; a swelling.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

tumor in Science

tumor

[tōōmər]
  1. See neoplasm. See Note at cancer.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

tumor in Culture

tumor

An abnormal mass of new tissue growth that serves no function in the body. Tumors are usually classified as benign or malignant and are often caused by cancer.

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The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.