Jumlah ismiyyah: a nominal sentence
جُمْلَة اِسْمِيَّةjumlah ismiyyah - nominal sentence
Jumlah ismiyyah is a nominal sentence in Arabic grammar, a sentence that begins with an ism.
Simple explanation
جُمْلَة اِسْمِيَّة (jumlah ismiyyah) is a sentence that begins with an اِسْم (ism).
It is usually built around a beginning part and a completing part.