Etymology

undecahydrate

U1N1D2E1C3A1H4Y4D2R1A1T1E1

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

English hydrate ← French hydrate
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The story

  1. Englishundeca-
  2. Frenchhydrate
  3. Englishhydrate
  4. English todayundecahydrate

From undeca- + hydrate.

Etymology from Wiktionary, CC BY-SA 4.0.