Etymology

parahelium

P3A1R1A1H4E1L1I1U1M3

Today it means: The form of the helium atom in which the spins of the two electrons form a singlet state (a state with zero total spin) Full definition →

English helium ← New Latin helium
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The story

  1. Englishpara-
  2. New Latinhelium
  3. Englishhelium
  4. English todayparahelium

From para- + helium.

Etymology from Wiktionary, CC BY-SA 4.0.