heptahydrate

[hep-tuh-hahy-dreyt]

noun

1. a hydrate that contains seven molecules of water, as magnesium sulfate, MgSO 4 ⋅7H 2 O.

Other Word Forms

• heptahydrated adjective

Word History and Origins

Origin of heptahydrate¹

First recorded in 1870–75; hepta- + hydrate

Example Sentences

The solubility of the hexahydrate is greater than that of the heptahydrate below 39�, but increases more slowly with rise of temperature.

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