During the medieval period, there was a region called ''ʿIrāq ʿArabī'' ("Arabian Iraq") for Lower Mesopotamia and ''ʿIrāq ʿAjamī'' ("Persian Iraq"), for the region now situated in Central and Western Iran. The term historically included the plain south of the Hamrin Mountains and did not include the northernmost and westernmost parts of the modern territory of Iraq. Prior to the middle of the 19th century, the term '''Eyraca Arabica''' was commonly used to describe Iraq.