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hydrate

 - 8 dictionary results

hy⋅drate

  [hahy-dreyt] noun, verb, -drat⋅ed, -drat⋅ing.
Use hydrate in a Sentence
–noun
1. any of a class of compounds containing chemically combined water. In the case of some hydrates, as washing soda, Na2CO3·10H2O, the water is loosely held and is easily lost on heating; in others, as sulfuric acid, SO3·H2O, or H2SO4, it is strongly held as water of constitution.
–verb (used with object), verb (used without object)
2. to combine chemically with water.
Origin:
1795–1805; hydr- 1 + -ate 2

Related forms:
hy⋅dra⋅tion, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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hy·drate   (hī'drāt')   
n.  A solid compound containing water molecules combined in a definite ratio as an integral part of the crystal.
v.   hy·drat·ed, hy·drat·ing, hy·drates

v.   tr.

  1. To rehydrate.

  2. To supply water to (a person, for example) in order to restore or maintain fluid balance: "Cold water is the fastest and safest way to hydrate an ordinary athlete" (Jane E. Brody).

v.   intr.
To become a hydrate.
hy·dra'tion n., hy'dra'tor n.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

hydrate 
1802, "compound of water and another chemical," from Fr. hydrate, coined by Fr. chemist Joseph-Louis Proust (1754-1826) from Gk. hydr-, stem of hydor "water" (see water (n.1)). The verb is first attested 1850.
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: 1hy·drate
Pronunciation: 'hI-"drAt
Function: noun
: a compound (as Glauber's salt) formed by the union of water with some othersubstance

Main Entry: 2hydrate
Function: verb
Inflected Forms: hy·drat·ed; hy·drat·ing
transitive senses
: tocause to take up or combine with water or the elements of water hydrate intransitive senses
: to become a hydrate
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

hydrate hy·drate (hī'drāt')
n.
A solid compound containing water molecules combined in a definite ratio as an integral part of a crystal. v. hy·drat·ed, hy·drat·ing, hy·drates

  1. To rehydrate.

  2. To supply water to a person or thing in order to restore or maintain fluid balance.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Science Dictionary
hydrate   (hī'drāt')  Pronunciation Key 
Noun   A compound produced by combining a substance chemically with water. Many minerals and crystalline substances are hydrates.

Verb  

  1. To combine a compound with water, especially to form a hydrate.

  2. To supply water to a person in order to restore or maintain a balance of fluids.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia

hydrate

any compound containing water in the form of H2O molecules, usually, but not always, with a definite content of water by weight. The best-known hydrates are crystalline solids that lose their fundamental structures upon removal of the bound water. Exceptions to this are the zeolites (aluminum silicate minerals or their synthetic analogues that contain water in indefinite amounts) as well as similar clay minerals, certain clays, and metallic oxides, which have variable proportions of water in their hydrated forms; zeolites lose and regain water reversibly with little or no change in structure

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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