Islamic concepts

Juz

During the month of Ramaḍān, the entire Qurʾān is divided into 30 parts (Juzʾ), one to recite each night. The last of these parts is Juzʾ ʿAmma, containing chapters 78 to 114. These chapters are the shortest, most expressive and most frequently recited during ritual prayer.

http://islam.about.com/od/quranin30days/a/juz_index.htm

اجزاء

Ajzāʾ