Epsilon Definition

ĕpsə-lŏn, -lən

noun

The fifth letter of the Greek alphabet (Ε, ε)

Webster's New World

(phonetics) In IPA, the phonetic symbol that represents the open-mid front unrounded vowel; represented in SAMPA as E.

Wiktionary

(mathematics) An arbitrarily small quantity.

Wiktionary

(computing, colloquial) A negligible effect.

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

Wiktionary

Other Word Forms of Epsilon

Singular:

epsilon

Plural:

epsila, epsilons

Greek e psīlon simple e from neuter of psīlos simple

From American Heritage Dictionary of the English Language, 5th Edition
From Ancient Greek ἒψιλόν (epsilon, “the letter Ε”).

From Wiktionary

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