Etymology

deuterium

deu·te·ri·um
D2E1U1T1E1R1I1U1M3

Today it means: An isotope of hydrogen with one proton and one neutron in each atom - 21H. Full definition →

English deutero- ← Ancient Greek δεύτερος (deúteros) ← Proto-Indo-European *dews-?
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The story

  1. Proto-Indo-European*dews-?
  2. Ancient Greekδεύτερος (deúteros)
  3. Englishdeutero-
  4. English todaydeuterium

From deutero- + -ium. Coined by American physical chemist Harold Urey, from Ancient Greek δεύτερος (deúteros, “second”).

Words from the same roots

Ancient Greekδεύτερος all →

deuterondeuteridedeutero-

Etymology from Wiktionary, CC BY-SA 4.0.