Arabic term (edited): ��������

I would transliterate this as "hawamim" and then add in an explanatory translatory, or footnote as it could be lengthy, to explain that this term refers to the "29 chapters of the Qur'an/Koran that begin with separate letters and not words"; these are chapters that begin with letters such as حم, الم, etc. Or you could translate as "hawamim (chapters of the Qur'an/Koran starting with the letters HA and MIM".

http://www.britannica.com/eb/article?tocId=9033853
(Arabic“prefatory ones”)

also called hawamim (the letters ha and mim) , or huruf al-muqatta'ah (Arabic: the “detached letters”) letters of the alphabet appearing at the beginning of 29 of the surahs (chapters) of the Muslim sacred scripture, the Qur'an. The 14 letters thus designated occur singly and in various combinations of two to five. As the letters always stand separately (muqatta'ah), they do not form words and are read by their alphabetic names, as ha mim, alif lam mim, ta sin mim.

Hope that helps, Aisha