off-gas

1 of 2

noun

plural off-gases also off-gasses
: a gas that is produced as a by-product of an industrial process or that is given off by a manufactured object or material
Refinery off-gases from fluid catalytic cracking could be a source of ethylene.Predicasts Technology Update

off-gas

2 of 2

verb

off-gassed; off-gassing

transitive + intransitive

: to give off a typically harmful gas
In addition, OSHA intends to amend the hazard communication provisions of the standard to require hazard warning labels for solid materials capable of off-gassing formaldehyde at levels between 0.1 ppm and 0.5 ppm …Chemical & Engineering News
… there have been environmental concerns about the phenol formaldehyde binders used in most engineered-wood products, which can off-gas.Max Alexander

Word History

First Known Use

Noun

1955, in the meaning defined above

Verb

1974, in the meaning defined above

Time Traveler
The first known use of off-gas was in 1955

Dictionary Entries Near off-gas

Cite this Entry

“Off-gas.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/off-gas. Accessed 1 Feb. 2023.

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