transitive verb (past and past participlehy·drat·ed, present participlehy·drat·ing, 3rd person present singularhy·drates)
Definition:
1. give water to somebody or something: to provide water for somebody or something in order to reestablish or maintain a correct fluid balance
2. chemistry add water to something: to add water to a chemical compound so that different crystals are formed
noun (pluralhy·drates)
Definition:
chemistry compound containing water: a chemical compound containing water molecules that can usually be expelled by heating, without decomposition of the compound
[Early 19th century. < French (noun) < Greek hudr- "water"]