hydrator

[hahy-drey-ter]
noun
1.
something that hydrates.
2.
a compartment or drawer, as in a refrigerator, for keeping perishable foods fresh and preventing moisture loss.

Origin:
hydrate + -or2

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
hydrate (ˈhaɪdreɪt)
 
n
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.  (not in technical usage) a chemical compound, such as a carbohydrate, that contains hydrogen and oxygen atoms in the ratio two to one
 
vb
4.  to undergo or cause to undergo treatment or impregnation with water
 
[C19: from hydro- + -ate1]
 
hy'dration
 
n
 
'hydrator
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
The hydrator of a kitchen refrigerator is an excellent place for seed storage.
Hydrator emissions are normally controlled by the use of either water sprays in the hydrator stack or by wet scrubbers.
The phosphorous is burned and water is added to the combustion gases and later collected in the hydrator-absorber.
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