from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. An abnormal growth of tissue resulting from uncontrolled, progressive multiplication of cells and serving no physiological function; a neoplasm.
  • n. A swollen part; a swelling.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An abnormal growth; differential diagnosis includes abscess, metaplasia, and neoplasia.

from the GNU version of the Collaborative International Dictionary of English

  • n. A morbid swelling, prominence, or growth, on any part of the body; especially, a growth produced by deposition of new tissue; a neoplasm.
  • n. Affected pomp; bombast; swelling words or expressions; false magnificence or sublimity.

from The Century Dictionary and Cyclopedia

  • n. A swell or rise of any kind.
  • n. In medicine: A swelling; one of the four necessary accompaniments, according to the older pathologists, of inflammation—namely, color, dolor, rubor, et tumor (heat, pain, redness, and swelling).
  • n. An abnormal prominence existing upon any of the cutaneous, mucous, or serous surfaces in any part of the body, and not due to acute inflammation.
  • n. A swelling port or style; tumidity; bombast.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. an abnormal new mass of tissue that serves no purpose


Middle English tumour, from Latin tumor, from tumēre, to swell; see teuə- in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Old French tumour, from Latin tumor ("swelling"), from tumeō ("I bulge, swell"). English usage attested since the 16th century. (Wiktionary)



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