Heptahydrate

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Wiktionary, Creative Commons Attribution/Share-Alike License
  • n. A hydrate whose solid contains seven molecules of water of crystallization per molecule, or per unit cell
  • The Century Dictionary and Cyclopedia
  • n. In chem., a compound containing seven molecules of water, as common copperas in crystals, or ferrous sulphate heptahydrate (FeSO4.7H2O).
  • Word Usage
    "[46] Green vitriol, ferrous sulphate heptahydrate, a compound of iron, sulphur, and oxygen, crystallised with seven molecules of water, represented by the formula FeSO4."