outgas

American  

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

verb (used with object)

outgassed, outgassing

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

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verb (used without object)

outgassed, outgassing

1. to lose gas.

outgas British  

/ ˌaʊtˈɡæs /

verb

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

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Etymology

Origin of outgas

First recorded in 1920–25; out- + gas

Example Sentences

See Examples For:

outgas outgassed outgassing

“They’re like rockets, right? They outgas, and when they spit something out, Newton’s law says you go the other way.”

From Scientific American ● Mar. 22, 2023

It didn’t help that silicone sealant used on the capsule outgassed, creating a greasy, foggy oil that coated some of the spacecraft windows.

From Salon ● Dec. 21, 2018

Prior to measurements, the samples were outgassed and heated at 573 K for 16 h under vacuum.

From Nature ● Mar. 14, 2017

That source, however, could also be the rover itself, which has components known to have outgassed small amounts of methane in the past.

From Washington Post ● Dec. 17, 2014

It is even possible that the material outgassed from Io contributes, after many collisions and condensations, to the ring system of Jupiter.

From "Cosmos" by Carl Sagan

Ultimately the methods invented by British chemists and physicists outgassed the Germans.

From The New Gresham Encyclopedia Volume 4, Part 3: Estremoz to Felspar by Various

"Nothing's happening, then: outgassing and boom-boom-boom – all these explosions."

From BBC ● Jan. 15, 2026

"Based on the geological evolution of the area, we estimate that CO2 outgassing from the crust and mantle has probably occurred over the last 2 million years."

From Science Daily ● Apr. 19, 2024

They will check for any breaches or outgassing from the capsule to assure both the area and the payload are safe and sound for a soon-to-follow entourage of personnel.

From Scientific American ● Jul. 27, 2023

"There are still many unknowns regarding volcanism and how long a planet can maintain outgassing processes," Kane said, referring to the release of trapped gas that occurs with eruptions.

From Reuters ● May 17, 2023

Seligman added that previous observations of comets show that it is possible to identify them based on outgassing, and not through a coma observation.

From Salon ● Mar. 26, 2023