tumor

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


Origin:
1535–45; < Latin: a swelling, swollen state, equivalent to tum(ēre) to swell + -or -or1

tumorlike, adjective
tumorous, tumoral, adjective
antitumor, adjective, noun
antitumoral, adjective
nontumorous, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Etymonline
Word Origin & History

tumor
1540s, from L. tumor "swelling, condition of being swollen," from tumere "to swell" (see thigh).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

tumor tu·mor (tōō'mər, tyōō'-)
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.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
tumor   (t'mər)  Pronunciation Key 
See neoplasm. See Note at cancer.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary

tumor definition


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.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences for tumors
Mri should be routinely used in the workup of malignant tumors.
Note that some neoplasms, such as leukemia, do not form tumors.
Recurrence new tumors that appear at the site of the original tumor after
  surgery.
Metastasis new tumors that appear far from the original tumor.
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