1. Any compound that contains water of crystallization
   "Copper sulphate pentahydrate is a common hydrate used in chemistry labs"

1. Supply water or liquid to in order to maintain a healthy balance
   "the bicyclists must be hydrated frequently"
    
2. Become hydrated and combine with water
   "The mixture hydrates when exposed to moisture"
    
3. Cause to be hydrated; add water or moisture to
   "hydrate your skin"

Derived forms: hydrated, hydrates, hydrating

Type of: change, chemical compound, compound, furnish, humidify, offer, provide, render, supply

Antonym: exsiccate

Encyclopedia: Hydrate