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[hahy-drok-sahyd, -sid] /haɪˈdrɒk saɪd, -sɪd/
a chemical compound containing the hydroxyl group.
Origin of hydroxide
1820-30; hydr-2 + oxide Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for hydroxide
  • After that you warm the oil up and add sodium hydroxide and methanol.
  • The important thing to keep running was the fan that pumped air through a canister of sodium hydroxide.
  • Ammonium hydroxide is a colorless liquid chemical solution that forms when ammonia dissolves in water.
  • Oxalic acid is made commercially by treating either sugar with nitric acid or cellulose with sodium hydroxide.
  • The aluminium hydroxide in the lateritic bauxite deposits is almost exclusively gibbsite.
  • Sodium hydroxide is the principal strong base used in the chemical industry.
  • Sodium hydroxide has been used as a relaxer to straighten hair.
British Dictionary definitions for hydroxide


a base or alkali containing the ion OH
any compound containing an -OH group
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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Word Origin and History for hydroxide

1851, from hydro- + oxide.

Online Etymology Dictionary, © 2010 Douglas Harper
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hydroxide in Medicine

hydroxide hy·drox·ide (hī-drŏk'sīd')
A chemical compound containing the hydroxyl group, especially one that releases a hydroxyl group when dissolved.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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hydroxide in Science
A chemical compound containing one or more hydroxyl radicals (OH). Inorganic hydroxides include hydroxides of metals, some of which, like sodium hydroxide (caustic soda) and calcium hydroxide, are strong bases that are important industrial alkalis. Some metal hydroxides, such as those of zinc and lead, are amphoteric (they act like both acids and bases). Organic hydroxides include the alcohols.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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