a substance formed by the suspension of small bubbles of gas in a liquid or solid: the reversal of an aerosol
Origin of aerogelaero- + gel
designating or of a small container in which gas under pressure is used to aerate and dispense foam through a valve
A highly porous solid formed from a gel, such as silica gel, in which the liquid is replaced with a gas.
(countable and uncountable, plural aerogels)
aero- + gel