Etymology

tetratomic

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Today it means: Consisting of four atoms. Full definition →

English atomic ← Ancient Greek τετρᾰ- (tetră-) ← Proto-Hellenic *kʷétwores
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The story

  1. Proto-Indo-European*kʷetwóres
  2. Proto-Hellenic*kʷétwores
  3. Ancient Greekτέσσᾰρες (téssăres)
  4. Ancient Greekτετρᾰ- (tetră-)
  5. Englishtetra-
  6. Englishatomic
  7. English todaytetratomic

From tetra- + atomic.

Etymology from Wiktionary, CC BY-SA 4.0.