• synonyms


[mon-ok-sahyd, muh-nok-]
noun Chemistry.
  1. an oxide containing one oxygen atom in each molecule.
Show More

Origin of monoxide

First recorded in 1865–70; mon- + oxide
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for monoxide

Historical Examples

British Dictionary definitions for monoxide


  1. an oxide that contains one oxygen atom per moleculecarbon monoxide, CO
Show More
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

Word Origin and History for monoxide


"oxide with one oxygen atom in each molecule," 1869, from mono- + oxide.

Show More
Online Etymology Dictionary, © 2010 Douglas Harper

monoxide in Medicine


  1. An oxide with each molecule containing one oxygen atom.
Show More
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

monoxide in Science


  1. A compound consisting of two elements, one of which is a single oxygen atom. Carbon monoxide, for example, contains a carbon atom bound to a single oxygen atom.
Show More
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.