Etymology

decahydrate

D2E1C3A1H4Y4D2R1A1T1E1

Today it means: A hydrate whose solid contains ten molecules of water of crystallization per molecule, or per unit cell. Full definition →

English hydrate ← French hydrate ← Late Latin decas
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The story

  1. Proto-Indo-European*déḱm̥
  2. Proto-Hellenic*dékə
  3. Ancient Greekδέκᾰ (dékă)
  4. Ancient Greekδεκάς (dekás)
  5. Late Latindecas
  6. Frenchdéca-
  7. Englishdeca-
  8. Frenchhydrate
  9. Englishhydrate
  10. English todaydecahydrate

From deca- + hydrate.

Etymology from Wiktionary, CC BY-SA 4.0.