عِيَارٌ
1.
and
مِعْيَارٌ are synonym; (S;) both signify [A standard of measure or weight;] a thing with which another thing is measured, or compared, and equalized; (Mgh;) [and with which it is assayed:] or a thing with which measures of capacity are measured, compared, or equalized: (Lth:) the عِيَار of a thing is that which is made, or appointed, a standard thereof, by which to regulate or adjust it; explained by مَا جُعِلَ نِظَامًا لَهُ. (Msb.)
2.
The عِيَار of dirhems, and of deenárs, is [The rate, or standard, of fineness;] the quantity of pure silver, and of pure gold, that is put into them. (Mgh.)
3.
[See also 1.]