from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Having no pores, not penetrable, impervious.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Not porous; especially, not having vessels that appear as pores. Opposite of porous.

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

  • adj. not porous; especially not having vessels that appear as pores


Sorry, no etymologies found.


  • The EPA's letter comes amid increased scrutiny of the impact of natural gas drilling on water quality, specifically hydraulic fracturing, the technique used to cull oil and gas from shale and other nonporous rocks.

    EPA, State Differ Over Wastewater Drilling Tests

  • To start, pour a small amount of dry pigment forming a mound onto a nonporous slab surface, such as glass or marble; then, make an impression in the center of the mound and, into that, pour a small amount of linseed or other oil.

    Daniel Grant: Some Artists Make Their Own Paints

  • Like almost all of Elsheimer's paintings, this story-within-a-landscape is small, just 12¼ inches by 16¼ inches, and painted on copper, whose smooth, nonporous surface intensifies the luminosity of the oil paint, makes his colors sparkle, and sharpens his minute details.

    The Story Within a Landscape

  • To remove the spores, use a stiff brush, a nonammonia detergent, and hot water to scrub mold off nonporous surfaces.

    Tip of the Day: How to make your own (less-toxic) household cleaners

  • It has a tight, nonporous weave (usually lightweight polyester, nylon, cotton jersey, or linen), and the material is infused with sunscreens (such as titanium dioxide and zinc microfibers).

    Simple Skin Beauty

  • Epicurean claims its cutting surfaces are ideal because they do not dull knives, are maintenance free, dishwasher safe, durable, environmentally friendly, temperature resistant up to 350, NSF approved and their nonporous surface prohibits bacteria growth.

    19 posts from November 2007

  • Oil-and-gas companies had known for decades that there was gas trapped in shale, a nonporous rock common in much of the U.S. but considered too dense to produce much gas.

    U.S. Gas Fields Go From Bust to Boom

  • Because the city has less water, runoff is greater in the cities because the pavements are largely nonporous (except by the pot holes).

    Heat island

  • Because stoneware pieces are fired at temperatures of 2,200 degrees Fahrenheit or higher, the glaze and the clay integrate to form a vitrified, nonporous surface.

    Uncovering Tonala's history at the National Ceramic Museum

  • Waste water is injected 1,000 feet or more below ground, under nonporous rock formations that prevent the water from escaping.

    Texas Sinkhole Puts Spotlight


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