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laughing gas(noun, anesthetic)
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APASmart Define. (2011). n2o thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/n2o/thesaurus/synonyms
ChicagoSmart Define. 2011. "n2o thesaurus" https://smartdefine.org/n2o/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2011, n2o thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/n2o/thesaurus/synonyms>.
MLASmart Define. "n2o thesaurus" 23 May 2011. Web. 20 September 2026. <https://smartdefine.org/n2o/thesaurus/synonyms>