any compound that contains water of crystallization cause to be hydrated; add water or moisture to; "hydrate your skin" become hydrated and combine with water supply water or liquid to in order to maintain a healthy balance; "the bicyclists must be hydrated frequently
A compound formed by the union of molecules of water with other molecules or atoms Under certain conditions, natural gas may unite chemically with free water to form hydrates, a solid compound resembling packed snow, at temperatures above the freezing point of water
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; as, ethyl hydrate, or common alcohol; calcium hydrate, or slaked lime
If a substance hydrates your skin, it makes it softer and less dry. After-sun products will cool and hydrate your skin. = moisturize. to supply someone or something with water to keep them healthy and in good condition dehydrate. a chemical substance that contains water