Ajam
Many Arabic sources refer to Persian language as Ajami language or Ajmo. Persian is the official language in Iran as "Parsi" and "Farsi", in Afghanistan as Parsi and Dari,  and Tajiki  in Tajikistan, Persian in Bahrain is called "Ajami" and in Kuwait "Ayami" . In classical Arabic, especially in the first centuries of the Islamic period, the Persian language was called "the language of the Ajam" لسان العجم, and the Iranian people were called the "Ajami" and the persian gulf was called Ajam Gulf, in many books and deed,  Tafsir al-Zahak The oldest commentary on Quran wrote on page 524 " In Surah An-Nahl, verse 103,the word Ajami refers to Salman Farsi and says Ajami is the Persians.  .also Arabic word for dictionary is mo'jam (moajam) that means definition of the non Arabs(ajam) word.