Open Dictionary
mouse here to listen, click to choose/add more
Location: USA
Source: Learn That Word
Profile URL:

Are you a native English speaker? How do you pronounce this word?

Thank you for contributing!
upload mp3 file or record now it's easy, promised!

{%type%} Definitions

WordNet 3.0Copyright Princeton University


Short "hint"

A group of extremely light and porous solid materials. The lightest is less than four times as dense as dry air.

Usage examples (34)
  • Silica aerogel is the most common type of aerogel and the most extensively studied and used.
  • This opened an completely new area in aerogel research.
  • It's made of aerogel, which is the lightest substance that we know of.
  • Oh-at the Museum in San Jose there was a pile of this stuff called aerogel-solid, yet almost entirely air. for more
Tutoring comment

Tutoring comment not yet available...

add more
The Open Dictionary of English is a collaborative project, based on Open Source materials, LearnThat resources, and partner APIs.
We give special thanks to our LearnThat volunteers, as well as Princeton University and Wiktionary for their Open Source word data. We're also grateful for the support given by Google,,, and YouTube,,,,, as well as the generous Creative Commons community.