Xi (letter) dialects of most of the Greek mainland and Euboea, the sound [ks] was represented by Χ (which in classical Greek is chi, used for ). Because this variant of the Greek alphabet was used in Italy, the Latin alphabet borrowed Χ rather than Ξ as the Latin letter X. While having no Latin derivative, the Xi was adopted into the early Cyrillic alphabet, as the letter ksi (Ѯ, ѯ). The uppercase letter Ξ is used as symbol for: The lowercase letter ξ is used as a symbol for: These characters are used only as mathematical symbols. Stylized Greek text should
History of the Greek alphabet of an upright and less ornamented style of writing more like Latin print. In 1982, the monotonic orthography was officially adopted, abandoning the rough and smooth breathings (since the sound had long since disappeared) and reducing the three types of accent mark to one (since the tone accent had been replaced by a stress accent). Greek pronunciation has also changed considerably since ancient times, but these changes have not been apparent from the orthography, which has remained conservative — see Greek alphabet for a summary of the current situation. The names of some letters were changed in order to distinguish