• synonyms


[nee-uh-plaz-uh m]
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noun Pathology.
  1. a new, often uncontrolled growth of abnormal tissue; tumor.
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Origin of neoplasm

1860–65; neo- + plasm
Related formsne·o·plas·tic [nee-uh-plas-tik] /ˌni əˈplæs tɪk/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for neoplasm

cyst, lump, cancer, swelling, carcinoma, bump, sarcoma, tumefaction, neoplasm

Examples from the Web for neoplasm

Historical Examples of neoplasm

  • A tumour or neoplasm is a localised swelling composed of newly formed tissue which fulfils no physiological function.

    Manual of Surgery

    Alexis Thomson and Alexander Miles

  • The cells of the neoplasm may undergo fatty degeneration, or they may become cornified.

British Dictionary definitions for neoplasm


  1. pathol any abnormal new growth of tissue; tumour
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Derived Formsneoplastic (ˌniːəʊˈplæstɪk), adjective
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

Word Origin and History for neoplasm


1864, coined in German by Karl Friedrich Burdach (1776-1847) from neo- + Greek plasma "formation" (see -plasm). Related: Neoplastic.

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Online Etymology Dictionary, © 2010 Douglas Harper

neoplasm in Medicine


  1. An abnormal new growth of tissue that grows by cellular proliferation more rapidly than normal, continues to grow after the stimuli that initiated the new growth cease, shows partial or complete lack of structural organization and functional coordination with the normal tissue, and usually forms a distinct mass of tissue which may be either benign or malignant.
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Related formsne′o•plastic (-plăstĭk) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

neoplasm in Science


  1. An abnormal growth of tissue in animals or plants. Neoplasms can be benign or malignant. Also called tumor
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Related formsneoplastic adjective (nē′ə-plăstĭk)
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.