hydrate

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A solid compound containing water molecules combined in a definite ratio as an integral part of the crystal.
2. v. To rehydrate.
3. v. To supply water to (a person, for example) in order to restore or maintain fluid balance: "Cold water is the fastest and safest way to hydrate an ordinary athlete” ( Jane E. Brody).
4. v. To become a hydrate.

Century Dictionary and Cyclopedia

1. n. In chem., a compound of a class which may be regarded as formed upon the same type as water, or by the substitution of a metallic atom, or a basic radical, for one of the atoms of hydrogen in water: for example, HOH, water; KOH, potassium hydrate; NH₄OH, ammonium hydrate.
2. To combine or impregnate with water.
3. To form into a hydrate.

Wiktionary

1. n. A solid compound containing or linked to water molecules.
2. n. Water.
3. v. To take up, consume or become linked to water.
4. v. To drink water.

GNU Webster's 1913

1. n. A compound formed by the union of water with some other substance, generally forming a neutral body, as certain crystallized salts.
2. n. A substance which does not contain water as such, but has its constituents (hydrogen, oxygen, hydroxyl) so arranged that water may be eliminated; hence, a derivative of, or compound with, hydroxyl; hydroxide.
3. v. To form into a hydrate; to combine with water.

WordNet 3.0

1. n. any compound that contains water of crystallization
2. v. supply water or liquid to in order to maintain a healthy balance
3. v. cause to be hydrated; add water or moisture to
4. v. become hydrated and combine with water