water of hydration

noun phrase

: water that is chemically combined with a substance to form a hydrate and can be expelled (as by heating) without essentially altering the composition of the substance

Word History

First Known Use

1864, in the meaning defined above

Medical Definition

water of hydration

noun

: water that is chemically combined with a substance to form a hydrate and can be expelled (as by heating) without essentially altering the composition of the substance