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

  • adj. Relating to, occurring in, or affecting interstices.
  • adj. Anatomy Relating to or situated in the small, narrow spaces between tissues or parts of an organ: interstitial cells; interstitial fluid.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Of, relating to, or situated in an interstice.
  • n. A webpage, usually carrying advertising, displayed before a content page.
  • n. An interstitial discontinuity in a crystal.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Of or pertaining to interstices; intermediate; within the tissues.

from The Century Dictionary and Cyclopedia

  • Pertaining to, situated in, or constituting an interstice or interstices: as, interstitial change.
  • In entomology, situated between striæ, etc.: as, interstitial punctures on the elytra of beetles.

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

  • adj. of or relating to interstices


from Wiktionary, Creative Commons Attribution/Share-Alike License

From interstitium +‎ -al.


  • The term interstitial cystitis for the syndrome is considered inappropriate as it indicates inflammation in the interstitum, which is often not present.

    Medlogs - Recent stories

  • I can't predict what will happen with interstitial art, but it will continue to evolve (as I think it has for quite some time now, under the guise of other nomenclatures) and if "interstitial" is not the term that defines this particular kind of art-making in the future, that's fine.

    EXCLUSIVE INTERVIEW: Delia Sherman and Christopher Barzak on Interfictions 2

  • I do think interstitial is about being "between" a variety of modes of category or operation, and I think what you're talking about could be described as interstitial activity, maybe, but I'm not sure to what purpose as of yet.

    EXCLUSIVE INTERVIEW: Delia Sherman and Christopher Barzak on Interfictions 2

  • And, because light can penetrate only about one millimeter into the skin, the glucose actually being monitored is contained in fluid found around blood vessels, called interstitial fluid, not within the vessels.

    Researchers Beaming at Light's Medical Uses

  • Don't get me wrong, within the vast multitrillion-dollar energy infrastructure, there lie many opportunities for entrepreneurs, technological advances and profit-making, in bringing what can only be termed interstitial revolutions within that sector.

    Clean Energy Driven Job Growth Is A Return To The Stone Age

  • Rather than trying to understand these as aberrations -- as the half-and-half and not-quite-either of "cross-genre" and "interstitial" -- or as subversions of the form, we might better approach each text as an individual permutation of possible approaches.

    Archive 2008-01-01

  • If you've had this experience, and antibiotics haven't helped, you may have a different and more aggravating condition called interstitial cystitis.

    Discomfort: The Mystery Of Cystitis

  • One of my favorite sci-fi writers William Gibson spends a good deal of time exploring the notion of interstitial spaces, especially in "All Tomorrow's Parties" and the rest of the series that book belongs to.

    Lived-in Future, Part 2

  • Although scientists have yet to identify the precise function of the clump, called the interstitial nuclei of the anterior hypothalamus 3 INAH 3, the hypothalamus is known as the seat of the emotions and sexual drives.

    Archive 2007-11-01

  • Yatterings has an interview with Delia Sherman and Theodora Goss about editing Interfictions, a new anthology of kick-ass stories also known as interstitial work.

    June 2007


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  • Webpagespeak for the web page/popup that presents itself before a user gets access to a content page. Spotted in news.

    August 24, 2016

  • William Gibson uses this word in All Tomorrows Parties.

    September 13, 2009