الخبير
كلمةُ (الخبير) في اللغةِ صفة مشبَّهة، مشتقة من الفعل (خبَرَ)،...
Anything whose quantity is determined by counting and calculation.
"Ma‘dūdāt" (countables) are those things whose quantity can be measured by counting the number of units which they comprise. "Ma‘dūdāt" are of two categories: 1. Similar "ma‘dūdāt": These are things that are similar to each other in value without significant dissimilarities that would cause a difference in the value of each individual unit; e.g. a carton of eggs is a "ma‘dūd" whose quantity is known by counting the eggs it holds, without the need to know the value of each egg separately. 2. Dissimilar "ma‘dūdāt": These are things whose units are dissimilar from each other such that there is a difference in the value of each unit; e.g. a flock of sheep is a dissimilar "ma‘dūd". To calculate its price, it is needed to know both the number of sheep and the individual value of each head.
"Ma‘dūdāt" (sing. ma‘dood): Derived from "‘adad", which means the amount of anything countable in terms of the number of its individual units.