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heptahydrate

[hep-tuh-hahy-dreyt] /ˌhɛp təˈhaɪ dreɪt/
noun
1.
a hydrate that contains seven molecules of water, as magnesium sulfate, MgSO 4 ⋅7H 2 O.
Origin
1870-1875
1870-75; hepta- + hydrate
Related forms
heptahydrated, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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