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Epsilon

//ɛpˈsaɪ.lən// noun, slang

Definitions

Noun
  1. 1
    The fifth letter of the Greek alphabet, ε or Ε, preceded by delta (Δ, δ) and followed by zeta (Ζ, ζ). countable, uncountable
  2. 2
    the 5th letter of the Greek alphabet wordnet
  3. 3
    In IPA, the phonetic symbol ɛ that represents the open-mid front unrounded vowel. countable, uncountable
  4. 4
    An arbitrarily small quantity. countable, uncountable
  5. 5
    An arbitrarily small quantity.; A small child. colloquial, countable, uncountable
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  1. 6
    Something negligible or insignificant. colloquial, countable, uncountable

    "Yes, we have to convert all the symbol names to upper case at startup, but that’s epsilon."

  2. 7
    The percentage change in an option value with respect to the underlying dividend yield. countable, uncountable

Etymology

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

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