epsilon.
epsilon, the name for the fifth letter of the Greek alphabet
Meaning & usage
epsilon, the name for the fifth letter of the Greek alphabet
the IPA symbol that represents the open-mid front unrounded vowel
an arbitrarily small quantity
Where this word comes from
From Ancient Greek ἒ ψιλόν (è psilón, “the letter Ε”).
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.