hydrate

[hahy-dreyt]

noun

1. any of a class of compounds containing chemically combined water. In the case of some hydrates, as washing soda, Na 2 CO 3 ⋅10H 2 O, the water is loosely held and is easily lost on heating; in others, as sulfuric acid, SO 3 ⋅H 2 O, or H 2 SO 4 , it is strongly held as water of constitution.

verb (used with or without object)

hydrated, hydrating 

1. to combine chemically with water.

hydrate

/ ˈhaɪdreɪt /

noun

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 (H 2 SO 4 ) dissociates into sulphur trioxide (SO 3 ) and water (H 2 O)

3. (not in technical usage) a chemical compound, such as a carbohydrate, that contains hydrogen and oxygen atoms in the ratio two to one

verb

1. to undergo or cause to undergo treatment or impregnation with water

hydrate

1. A compound produced by combining a substance chemically with water. Many minerals and crystalline substances are hydrates.

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.

Other Word Forms

• hydration noun
• hydrator noun

Word History and Origins

Origin of hydrate¹

First recorded in 1795–1805; hydr- ¹ + -ate ²

Word History and Origins

Origin of hydrate¹

C19: from _hydro- + _-ate ¹

Example Sentences

"Half my clients really notice a huge difference - their skin feels more hydrated, healthier, younger - while the other half don't see such a big change. But their skin does tend to feel tighter and fresher."

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For 45 minutes, a “Q-facial” machine sprayed, vacuumed, exfoliated and hydrated my face, delivering ultrasonic waves at two different depths.

Read more on The Wall Street Journal

As well as thinking about food, Dr Munro says regular exercise, good sleep, stress management and staying hydrated can also help reduce headaches.

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“If I’m going to go to my members and say, ‘OK, you need to spend $5,000 doing one thing to protect your home,’ it’s not going to be to remove hydrated vegetation.”

Read more on Los Angeles Times

She started fueling before workouts, increasing her protein intake and staying hydrated.

Read more on The Wall Street Journal