الخبير
كلمةُ (الخبير) في اللغةِ صفة مشبَّهة، مشتقة من الفعل (خبَرَ)،...
A unit of measuring weight equal to 72 medium-sized grains of barley, equivalent to 4.24 grams.
"Mithqāl" (unit of weight) is a unit of measuring weight that is equal to the weight of 72 full grains of barley. It is roughly equivalent to 4.24 grams, which is also the weight of a pure gold dinar or one and 3/7 of a dirham. The weight of the "mithqāl" is the same in both the pre-Islamic and the Islamic era.
"Mithqāl": a known measure of weight, whether large or small. It is used in particular to mean a dinar of gold. Derived from "thiqal", which means heaviness.