Oxus or Amu-daria, a great river of Central Asia, rises in the Pamirs, and flows W. between Turkestan and Afghanistan, then N. through Turkestan to the Sea of Aral; it is believed at one time to have flowed into the Caspian, and there is record of two changes of course; half its waters are absorbed in irrigating the plains of Khiva.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Oxfordshire * Oxygen