اِسْمُ الْجِنْسِ common noun

اِسْمُ الجِنْسِ/A generic or common noun may be either a) اِسْمُ العَيْنِ/A noun denoting a concrete object for example رَجُلٌ/A man and b)  اِسْمُ المَعْنَى/A noun denoting an abstract idea for example عِلْمٌ/knowledge.