aerogel
/ˈɛroʊˌdʒɛl/
noun
- A very light, porous solid material made from a gel where the liquid is replaced by gas, known for being an excellent insulator.
- This aerogel blanket can keep a house warm while being much thinner than traditional insulation.
- Aerogel is so light that a small piece can rest on top of a flower without damaging it.
- Scientists use aerogel to insulate spacecraft because it is extremely effective at blocking heat.