ethylene oxide

noun

: a colorless flammable toxic compound C2H4O used especially in synthesis (as of ethylene glycol) and in sterilization and fumigation

Examples of ethylene oxide in a Sentence

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Higher autism severity scores and weaker daily living skills were also linked with ethylene oxide. Sharon Lerner, CNN Money, 22 Aug. 2025 Higher autism severity scores and weaker daily living skills were also linked with ethylene oxide. Sharon Lerner, ProPublica, 21 Aug. 2025 One proclamation targeted exemptions at 39 medical equipment manufacturing facilities, which often use the gas ethylene oxide to sterilize their products. Sophie Hartley, IndyStar, 25 July 2025 One proclamation exempts about 40 medical device sterilizing plants from requirements to reduce 90 percent of their emissions of cancer-causing ethylene oxide. Rachel Frazin, The Hill, 18 July 2025 See All Example Sentences for ethylene oxide

Word History

First Known Use

1866, in the meaning defined above

Time Traveler
The first known use of ethylene oxide was in 1866

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Cite this Entry

“Ethylene oxide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ethylene%20oxide. Accessed 10 Sep. 2025.

Medical Definition

ethylene oxide

noun
: a colorless flammable toxic gaseous or liquid compound C2H4O used especially in synthesis (as of ethylene glycol) and in fumigation and sterilization (as of medical instruments)

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