outgas

[ out-gas, out-gas ]
/ ˈaʊtˌgæs, ˌaʊtˈgæs /
Chemistry

verb (used with object), out·gassed, out·gas·sing.

to remove (adsorbed or occluded gases), usually by heat or reduced pressure.

verb (used without object), out·gassed, out·gas·sing.

to lose gas.

Origin of outgas

First recorded in 1920–25; out- + gas

British Dictionary definitions for outgassing

outgas
/ (ˌaʊtˈɡæs) /

verb -gases, -gasses, -gassing or -gassed

to undergo or cause to undergo the removal of adsorbed or absorbed gas from solids, often by heating in free space