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

  • n. A highly porous solid formed from a gel, such as silica gel, in which the liquid is replaced with a gas.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A solid-state substance, similar to gel, in which the liquid component is replaced with gas.


aero- +‎ gel (Wiktionary)


  • Silica aerogel is an extemely low-density material derived from silicon based gel, in which the liquid component of the gel has been replaced with gas.

    Solid Smoke

  • Silica aerogel is the most common type of aerogel and the most extensively studied and used.

    Solid Smoke

  • This opened an completely new area in aerogel research.

    A Real Spinoff that NASA Has Seemingly Forgotten About - NASA Watch

  • It's made of aerogel, which is the lightest substance that we know of.

    CNN Transcript Jan 13, 2006

  • Oh-at the Museum in San Jose there was a pile of this stuff called aerogel-solid, yet almost entirely air.


  • Cabot's aerogel, which is the lightest and best insulating solid in the world.

  • It extended a retractable device containing cells filled with a material called aerogel, a porous substance designed to trap dust molecules.

    BBC News | News Front Page | World Edition

  • The tangled nanotubes are constructed into a film that can be described as an aerogel, meaning it contains more air than anything else.

    New Scientist - Space

  • The 'aerogel' is almost as light as air, as stretchy as rubber, and stiffer than steel by weight.

    Blah, Blah! Technology

  • Nearly every story they present would be crushed like a block of aerogel hit by a hammer if the slightest bit of skepticism were applied.

    Coyote Blog » Blog Archive » Balloon Boy in a Prius


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