epsilon

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ep·si·lon / ˈepsiˌlän/ • n. the fifth letter of the Greek alphabet (Ε, ε), transliterated as ‘e.’ ∎  [as adj.] denoting the fifth in a series of items, categories, etc. ∎  (Epsilon) [followed by Latin genitive] Astron. the fifth star in a constellation: Epsilon Carinae.

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