heptahydrate

[ hep-tuh-hahy-dreyt ]

noun

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

Other Words From

• hepta·hydrat·ed 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.

From Project Gutenberg