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Synonyms

laughing gas

American  
laughing gas British  

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 Scientific  
/ lăfĭng /
  1. Nitrous oxide used as a mild anesthetic.


Etymology

Origin of laughing gas

First recorded in 1835–45

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Select locations will offer laughing gas as a pain reliever for insertion and removal of IUDs.

From The Wall Street Journal Mar. 1, 2026

"Engine tests have shown varying degrees of emissions of laughing gas, which is a very potent greenhouse gas with more than 200 times the global warming impact than carbon dioxide."

From Science Daily Feb. 5, 2024

It’s a little like “Mad Max” on laughing gas.

From New York Times Jul. 20, 2023

The ban on laughing gas is part of a £160m plan to tackle anti-social behaviour, homelessness, begging and graffiti.

From BBC Mar. 28, 2023

The aroma was like laughing gas in the dentist’s chair—it made everything else go away.

From "The Lightning Thief" by Rick Riordan

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