xiEnglishOxford New American Dictionaryxi /zī, , zaɪ , ksī, ksaɪ / ▸ noun the fourteenth letter of the Greek alphabet (Ξ, ξ), transliterated as ‘x.’. ▪ [followed by Latin genitive] (Xi) Astronomy the fourteenth star in a specified constellation: Xi Cygni. – ORIGIN Greek.
EnglishOxford New American DictionaryEnglishOxford New American Dictionary
EnglishOxford New American Dictionary