nitrous oxide


noun Chemistry, Pharmacology.

a colorless, sweet-smelling, sweet-tasting, nonflammable, slightly water-soluble gas, N2O, 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.

RELATED WORDS


Nearby words

  1. nitrosylsulfuric acid,
  2. nitrous,
  3. nitrous acid,
  4. nitrous bacteria,
  5. nitrous ether,
  6. nitroxanthic acid,
  7. nitryl,
  8. nits-and-lice,
  9. nitti,
  10. nitti, francesco saverio

Origin of nitrous oxide

First recorded in 1790–1800

Also called laughing gas.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for nitrous oxide

  • In 1844, Horace Wells, a native of Vermont, discovered that the inhalation of nitrous-oxide gas produces anaesthesia.

    Stories Of Georgia|Joel Chandler Harris
  • 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
  • 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

noun

a colourless nonflammable slightly soluble gas with a sweet smell: used as an anaesthetic in dentistry and surgery. Formula: N 2 OSystematic 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

Medicine definitions for nitrous oxide

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.

Science definitions for nitrous oxide

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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.