heptahydrate

[ hep-tuh-hahy-dreyt ]
/ ˌhɛp təˈhaɪ dreɪt /
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noun

a hydrate that contains seven molecules of water, as magnesium sulfate, MgSO4⋅7H2O.

Origin of heptahydrate

First recorded in 1870–75; hepta- + hydrate
Related formshep·ta·hy·drat·ed, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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