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Concept
Æ
Summary
Æ (lowercase: æ) is a character formed from the letters a and e, originally a ligature representing the Latin diphthong ae. It has been promoted to the status of a letter in some languages, including Danish, Norwegian, Icelandic, and Faroese. It was also used in Old Swedish before being changed to ä. The modern International Phonetic Alphabet uses it to represent the near-open front unrounded vowel (the sound represented by the 'a' in English words like cat). Diacritic variants include Ǣ/ǣ, Ǽ/ǽ, Æ̀/æ̀, Æ̂/æ̂ and Æ̃/æ̃.
As a letter of the Old English Latin alphabet, it was called æsc, "ash tree", after the Anglo-Saxon futhorc rune ᚫ which it transliterated; its traditional name in English is still ash, or æsh if the ligature is included.
In Classical Latin, the combination AE denotes the diphthong ae̯, which had a value similar to the long i in fine as pronounced in most dialects of Modern English. Both classical and present practice is to write the letters separately, but the ligature was used in medieval and early modern writings, in part because æ was reduced to the simple vowel ɛ during the Roman Empire. In some medieval scripts, the ligature was simplified to ę, an e with ogonek, called the e caudata (Latin for "tailed e"). That was further simplified into a plain e, which may have influenced or been influenced by the pronunciation change. However, the ligature is still relatively common in liturgical books and musical scores.
In the modern French alphabet, æ (called e-dans-l'a, 'e in the a') is used to spell Latin and Greek borrowings like curriculum vitæ, et cætera, ex æquo, tænia, and the first name Lætitia. It is mentioned in the name of Serge Gainsbourg's song Elaeudanla Téïtéïa, a reading of the French spelling of the name Lætitia: "L, E dans l'A, T, I, T, I, A."
In English, usage of the ligature varies between different places and contexts, but it is fairly rare. In modern typography, if technological limitations make the use of æ difficult (such as in use of typewriters, telegraphs, or ASCII), the digraph ae is often used instead.
Official source
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