Arabic mile

The Arab, Arabic, or Arabian mile (Arabic: الميل‎, al-mīl) was a historical Arabic unit of length. Its precise length is disputed, lying between 1.8 and 2.0 km. It was used by medieval Arab geographers and astronomers. The predecessor of the modern nautical mile, it extended the Roman mile to fit an astronomical approximation of 1 minute of an arc of latitude measured along a north-south meridian. The distance between two pillars whose latitudes differed by 1 degree in a north-south direction was measured using sighting pegs along a flat desert plane.

There were 4000 cubits in an Arabic mile. If al-Farghani used the legal cubit as his unit of measurement, then an Arabic mile was 1995 meters long. If he used al-Ma'mun's surveying cubit, it was 1925 meters long or 1.04 modern nautical miles.

Al-Ma'mun's measurement

Around 830 AD, Caliph Al-Ma'mun commissioned a group of Muslim astronomers and Muslim geographers to measure the distance from Tadmur (Palmyra) to al-Raqqah, in modern Syria. They found the cities to be separated by one degree of latitude and the meridian arc distance between them to be 66²⁄₃ miles and thus calculated the Earth's circumference to be 24,000 miles.

Arabic

Arabic (/ˈærəbɪk/;Arabic: العَرَبِية‎, al-ʻarabiyyah [alʕaraˈbijja] or Arabic: عربي ,عربى‎ ʻarabī [ˈʕarabiː]) is the Classical Arabic language of the 6th century and its modern descendants excluding Maltese. Arabic is spoken in a wide arc stretching across Western Asia, North Africa, and the Horn of Africa. Arabic belongs to the Afroasiatic family.

The literary language, called Modern Standard Arabic or Literary Arabic, is the only official form of Arabic. It is used in most written documents as well as in formal spoken occasions, such as lectures and news broadcasts.

Arabic is a Central Semitic language, closely related to Aramaic, Hebrew, Ugaritic and Phoenician. Standard Arabic is distinct from and more conservative than all of the spoken varieties, and the two exist in a state known as diglossia, used side-by-side for different societal functions.

Some of the spoken varieties are mutually unintelligible, both written and orally, and the varieties as a whole constitute a sociolinguistic language. This means that on purely linguistic grounds they would likely be considered to constitute more than one language, but are commonly grouped together as a single language for political or religious reasons (see below). If considered multiple languages, it is unclear how many languages there would be, as the spoken varieties form a dialect chain with no clear boundaries. If Arabic is considered a single language, it is perhaps spoken by as many as 422 million speakers (native and non-native) in the Arab world, making it one of the six most-spoken languages in the world. If considered separate languages, the most-spoken variety would most likely be Egyptian Arabic with 89 million native speakers—still greater than any other Afroasiatic language. Arabic also is a liturgical language of 1.6 billion Muslims. It is one of six official languages of the United Nations.

Arab (disambiguation)

An Arab is a member of a major ethnolinguistic group primarily living in western Asia and northern Africa.

Arab may also refer to:

Arab, Arabic, Arabian or Ərəb may also refer to:

Places

Azerbaijan

Iran

United States

Biology

Arabic script

The Arabic script is a writing system used for writing several languages of Asia and Africa, such as Arabic, dialects of Mandinka, the Sorani and Luri dialects of Kurdish, Persian, Urdu, Pashto, and others. Even until the 16th century, it was used to write some texts in Spanish. It is the third-most widely used writing system in the world, after Latin and Chinese.

The Arabic script is written from right to left in a cursive style. In most cases the letters transcribe consonants, or consonants and a few vowels, so most Arabic alphabets are abjads.

The script was first used to write texts in Arabic, most notably the Qurʼān, the holy book of Islam. With the spread of Islam, it came to be used to write languages of many language families, leading to the addition of new letters and other symbols, with some versions, such as Kurdish, Uyghur, and old Bosnian being abugidas or true alphabets. It is also the basis for the tradition of Arabic calligraphy.

The Arabic script has the ISO 15924 codes Arab and 160.