May Allah bless you for your kindness!
'Arabi Mubeen is synonymous with the Quraish dialect of the exalted prophet's times, the original language of Revelation.
Yes, we have some great dictionaries on the subject.
Arabic has undergone evolution since the Qur’an was revealed. Trying to understand it through the Arabic that became prevalent a few centuries later or today will result in inaccuracies. It is of paramount importance to know that the original dialect is not extinct. It is very much alive and well in the Pre-Islamic and ‘Para-Islamic’ poetry and well preserved in some good dictionaries such as Tajil ‘Uroos, Lisan-il-‘Arab, Qamoos, Bahr-e-Muheet, Imam Raghib Ispahani’s Al-Mufridaat Fi Ghareeb-il-Qur’an and Lughaatil Qur’an.The first of these practically embraces the next two and the last one is an outstanding work from Arabic to Urdu by Allama G.A. Parwez.
The best of them in my view is MUFRADAT-E-RAGHIB by Imam Raghib Isfahani. It gives you the best explanation of MUQATT'AAT as well.
Abul-Qasim al-Hussein bin Mufaddal bin Muhammad, better known as Raghib Isfahani, was an eleventh-century Muslim scholar of Qur'anic exegesis and the Arabic language.
Born: Isfahan, Iran
Books: Al-Mufradat fi Gharib al-Quran