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View synonyms for laughing gas

laughing gas

noun

  1. nitrous oxide.

laughing gas

noun

  1. another name for nitrous oxide

“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

laughing gas

  1. Nitrous oxide used as a mild anesthetic.

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Word History and Origins

Origin of laughing gas1

First recorded in 1835–45

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laughinglaughing gull

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