• synonyms


adjective Biology.
  1. outside a cell or cells.
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Origin of extracellular

First recorded in 1865–70; extra- + cellular
Related formsex·tra·cel·lu·lar·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for extracellular

Historical Examples

  • In the case of animals with extracellular luminescence we may speak of luminous secretions and true luminous glands.

    The Nature of Animal Light

    E. Newton Harvey

  • Extracellular (or Soluble) Toxins: those which are diffused into, and held in solution by, the surrounding medium.

  • Extracellular iodin-staining granules, which are present normally, are more numerous in iodophilia.

  • They may take a smear, and they find that—intra and extracellular diplococci, they treat the patient for gonorrhea.

    Warren Commission (8 of 26): Hearings Vol. VIII (of 15)

    The President's Commission on the Assassination of President Kennedy

  • Such toxins being set free in the culture medium are often known as extracellular.

British Dictionary definitions for extracellular


  1. biology situated or occurring outside a cell or cells
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Derived Formsextracellularly, adverb
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

extracellular in Medicine


  1. Located or occurring outside a cell or cells.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

extracellular in Science


  1. Located or occurring outside a cell or cells.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.