hydrate

1. a chemical compound containing water that is chemically combined with a substance and can usually be expelled without changing the constitution of the substance

2. a chemical compound that can dissociate reversibly into water and another compound. For example sulphuric acid (H₂SO₄) dissociates into sulphur trioxide (SO₃) and water (H₂O)

3. a chemical compound, such as a carbohydrate, that contains hydrogen and oxygen atoms in the ratio two to one

Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

hydrate

[′hī‚drāt]

(chemistry)

A form of a solid compound which has water in the form of H₂ O molecules associated with it; for example, anhydrous copper sulfate is a white solid with the formula CuSO₄, but when crystallized from water a blue crystalline solid with formula CuSO₄·5H₂ O results, and the water molecules are an integral part of the crystal.

A crystalline compound resulting from the combination of water and a gas; frequently a constituent of natural gas that is under pressure.

hydrate

1. To combine with water or elements of water.

2. Hydrated lime.

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References in periodicals archive

If you're hydrated, you have more energy and feel less tired.

Somebody wasn't thinking

So, it's up to us to ensure that our children stay well hydrated. Younger children also have a relatively higher body surface which leads to increased water loss through their skin.

A prescription for keeping children hydrated

Staying hydrated while exercising It's essential to keep hydrated while exercising as water regulates your body temperature and lubricates your joints.

DAVID FAIRLAMB THE FIT FACTOR

Your body will use it to stay hydrated just as it would water without all the fizz and excitement.

Sparkling water for hydration

During this stage, the hydrated soil specimen may be subjected to a destructive test (e.g., a triaxial compression test) or a nondestructive test (e.g., acoustic, thermal, or flow property measurements, computer tomography, or electron scanning to generate hydrate distribution profiles).

Estimating pore space hydrate saturation using dissociation gas evolution measurements: in relevance to laboratory testing of natural or artificially synthesised hydrate-bearing soil specimens

Recent estimates of the world's naturally-occurring hydrated methane vary widely, ranging from 2.5 x [10.sup.15] [m.sup.3] [5] to 1.2 x [10.sup.17] [m.sup.3] [6] at standard temperature and pressure, but the amount of organic carbon in hydrates can be conservatively estimated as a factor of two greater than the total of all remaining petroleum and natural gas reserves [7].

NIST gas hydrate research database and web dissemination Channel

Given that age, they could deduce the environmental conditions from the thickness of the hydrated layer on the obsidian, Anovitz notes.

Obsidian artifacts can record ancient climate

Studies do indicate stomach disturbance with dehydration, therefore it is important to remain hydrated while cycling so one is not dehydrated during the run portion of the race.

Stomach shut down

But there are some simple steps to keep your body and skin hydrated while airborne, experts say.

High and dry

Working in the heat means drinking lots of water so your body stays hydrated. So you drink lots of water.

Providing power in the heat

Sport drinks are flavored, which encourages players to drink more helping them stay better hydrated and they contain sodium and potassium to help replace what's lost in sweat.

The right way to play: injury prevention tips. (Side Lines)

Series of white hydrated alumina fire retardants/smoke suppressants in a range of particle sizes.

FLAME RETARDANTS