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aerogel
(er′ō jel′)
noun
a substance formed by the suspension of small bubbles of gas in a liquid or solid: the reversal of an aerosol
Origin: aero- + gel
adjective
designating or of a small container in which gas under pressure is used to aerate and dispense foam through a valve
See aerogel in American Heritage Dictionary 4
noun
A highly porous solid formed from a gel, such as silica gel, in which the liquid is replaced with a gas.
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