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laughing gas

noun

nitrous oxide.

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Origin:
1835–45

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Laughing gas is always a great word to know.

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a stew of meat, vegetables, potatoes, etc.

an extraordinary or unusual thing, person, or event; an exceptional example or instance.

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Collins

World English Dictionary

laughing gas

—n
	another name for nitrous oxide

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage

Medical Dictionary

laughing gas laugh·ing gas (lāf'ĭng)
n.
Nitrous oxide, especially as used as an anesthetic.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage

Science Dictionary

laughing gas

(lāf'ĭng) Pronunciation Key
Nitrous oxide used as a mild anesthetic.

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