Epsilon

Pronunciation

• IPA: /ˈɛpsɪlÉ’n/

Origin

From Ancient Greek ἒψιλόν (epsilon, "the letter Ε").

Full definition of epsilon

Noun

1. The name for the fifth letter of the Greek alphabet, ε or Ε, preceded by delta (Δ, δ) and followed by zeta (Ζ, ζ).
2. (phonetics) In IPA, the phonetic symbol that represents the open-mid front unrounded vowel; represented in SAMPA as E.
3. (mathematics) An arbitrarily small quantity.
4. (computing, colloquial) A negligible effect.Yes, we have to convert all the symbol names to upper case at startup, but that’s epsilon.