tumor

[ too-mer, tyoo- ]
/ ˈtu mər, ˈtyu- /
|

noun

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

Origin of tumor

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

Related forms

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for tumour

British Dictionary definitions for tumour

tumour

US tumor

/ (ˈtjuːmə) /

noun

pathol
  1. any abnormal swelling
  2. a mass of tissue formed by a new growth of cells, normally independent of the surrounding structures
obsolete pompous style or language

Derived Forms

tumorous or tumoral, adjective

Word Origin for tumour

C16: from Latin, from tumēre to swell
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for tumour

tumor

[ tōōmər ]

n.

An abnormal growth of tissue resulting from uncontrolled, progressive multiplication of cells and serving no physiological function; a neoplasm.
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.

Science definitions for tumour

tumor

[ tōōmər ]

See neoplasm. See Note at cancer.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Culture definitions for tumour

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.


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.