I. ˈhī-ˌdrāt noun
Date: 1802
: a compound formed by the union of water with some other substance
II. verb
( hy·drat·ed ; hy·drat·ing )
Date: 1846
transitive verb
1. : to cause to take up or combine with water or the elements of water
2. : to supply with ample fluid or moisture
hydrate s and softens the skin
intransitive verb
: to become a hydrate
• hy·dra·tion hī-ˈdrā-shən noun
• hy·dra·tor ˈhī-ˌdrā-tər noun