Definitions

from The Century Dictionary.

  • Containing live molecules of water in combination, as crystallized cupric sulphate or common blue vitriol, CuSO4.5H2O.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective chemistry Combined with five molecules of water

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

From penta- +‎ hydrated

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Examples

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