For engineering and manufacturing purposes the more important linear gauges are, however, now used, adjusted to some fundamental unit of measure as the inch; although in certain trades, as for wires and flat metals, gauges continue to be used of arbitrary scales and of merely numerical sizes, having no reference to a legal unit of measure; and such are rarely accurate.
The unit of measure is the zar or gez, of which, as in the case of the man, there are several variants.
The unit of measure for lateral acceleration, or " road-holding.
Diopter (D)-A unit of measure for describing the refractive power of a lens.
The carat is the unit of measure for diamond size, with one carat being equivalent to 200 milligrams, or one-fifth of a gram.