What is "transoxiana"

Transoxiana (also spelled Transoxania), known in Arabic sources as Māwarā‘ al-Nahr ( – “what [is] beyond the [Oxus] river”) and in Persian as Farārūd (, Farârud, – “beyond the [Amudarya] river”), is the ancient name used for the portion of Central Asia corresponding approximately with modern-day Uzbekistan, Tajikistan, southern Kyrgyzstan and southwest Kazakhstan. Geographically, it is the region between the Amu Darya ( Ốxos) and Syr Darya rivers. The area had been known to the Romans as Transoxania (Land beyond the Oxus), to the Arabs as Mawarannahr (Land Beyond the River), and to the Iranians as Turan, a term used in the Persian national epic Shahnameh.

The region was one of the satrapies of the Achaemenid dynasty of Persia under the name Sogdiana.

This region was named as "Bilad-al Turk" or " Turkestan" which means "the lands of Turks" by early Arabian geographers.