[hahy-drok-sahyd, -sid]
a chemical compound containing the hydroxyl group.

1820–30; hydr-2 + oxide

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World English Dictionary
hydroxide (haɪˈdrɒksaɪd)
1.  a base or alkali containing the ion OH--
2.  any compound containing an -OH group

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

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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American Heritage
Science Dictionary
hydroxide   (hī-drŏk'sīd')  Pronunciation Key 
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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Example sentences
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.
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