off-gas

English

Etymology

From off- +‎ gas.

Noun

off-gas (countable and uncountable, plural off-gases or off-gasses)

  1. (manufacturing) Gas produced as a side effect of a chemical reaction, sometimes hazardous.

Verb

off-gas (third-person singular simple present off-gasses or off-gases, present participle off-gassing, simple past and past participle off-gassed)

  1. (of a solid or liquid) To emit gases, especially noxious ones.
    • 2004, Old-House Journal, page 86:
      Since solvent-based paints can off-gas for a long time as they dry, when trapped in a tightly sealed building they can contribute to an unhealthy cocktail of chemicals in the air.

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