epsilon

[ ep-suh-lon, -luhnor, especially British, ep-sahy-luhn ]

Phonetic (Standard)IPA

noun

the fifth letter of the Greek alphabet (E, ε).
the consonant sound represented by this letter.
Mathematics. an arbitrarily small quantity, used to indicate that a given quantity is small, or close to zero.

Epsilon

/ ˈɛpsɪˌlɒn; ɛpˈsaɪlən /

noun

foll by the genitive case of a specified constellation the fifth brightest star in a constellation
Epsilon Aurigae

epsilon

/ ˈɛpsɪˌlɒn; ɛpˈsaɪlən /

noun

the fifth letter of the Greek alphabet (Ε, ε), a short vowel, transliterated as e

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Word History and Origins

Origin of epsilon¹

First recorded in 1400–50; from Greek e psīlón “bare, simple e ” (as opposed to diphthongal spellings which in later Greek represented the same sound)

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Word History and Origins

Origin of epsilon¹

Greek e psilon, literally: simple e

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