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nitrous oxide

noun, Chemistry, Pharmacology
a colorless, sweet-smelling, sweet-tasting, nonflammable, slightly water-soluble gas, N 2 O, that sometimes produces a feeling of exhilaration when inhaled: used chiefly as an anesthetic in dentistry and surgery, in the manufacture of chemicals, and as an aerosol.
Also called laughing gas.
Origin of nitrous oxide
1790-1800 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for nitrous-oxide
Historical Examples
  • It was then and not until then that the nitrous-oxide plant began running at anything like its real capacity.

    With the Doughboy in France Edward Hungerford
  • In 1844, Horace Wells, a native of Vermont, discovered that the inhalation of nitrous-oxide gas produces anaesthesia.

    Stories Of Georgia Joel Chandler Harris
  • To him is to be credited the first operation ever performed without pain by the use of nitrous-oxide gas.

British Dictionary definitions for nitrous-oxide

nitrous oxide

a colourless nonflammable slightly soluble gas with a sweet smell: used as an anaesthetic in dentistry and surgery. Formula: N2O Systematic name dinitrogen oxide Also called laughing gas
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
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nitrous-oxide in Medicine

nitrous oxide n.
A colorless sweet-tasting gas used as a mild anesthetic in dentistry and surgery.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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nitrous-oxide in Science
nitrous oxide  
A colorless, sweet-smelling gas. It is used as a mild anesthetic, often called laughing gas. Nitrous oxide occurs naturally in the atmosphere and is a greenhouse gas. Chemical formula: N2O.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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