Etymology

epsilon

ep·si·lon
E1P3S1I1L1O1N1

Today it means: The fifth letter of the Greek alphabet, ε or Ε, preceded by delta (Δ, δ) and followed by zeta (Ζ, ζ). Full definition →

Ancient Greek ἒ ψιλόν
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The story

  1. Ancient Greek · derived fromἒ ψιλόν“simple Ε”
  2. English todayepsilon

From Ancient Greek ἒ ψιλόν (è psilón, “simple Ε”).

Etymology from Wiktionary, CC BY-SA 4.0.