[ hep-tuh-hahy-dreyt ]
/ ˌhɛp təˈhaɪ dreɪt /
a hydrate that contains seven molecules of water, as magnesium sulfate, MgSO4⋅7H2O.
Related formshep·ta·hy·drat·ed, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for heptahydrate
Following this there will be deposition of the heptahydrate (point 3), with subsequent disappearance of the liquid phase.The Phase Rule and Its Applications|Alexander Findlay