NCIt definition : The traditional unit of mass derived from the weight of a grain and equal to one seven-thousandth
of a pound, or 1/480 troy ounce, or 64.79891 milligrams. The original English grain
unit based on the mass of a ripe grain barleycorn was larger the corresponding grain
units of France and other European nations which were based on the weight of the smaller
wheat grain.;
Alternative definition : CDISC: A unit of mass derived from the weight of a grain and equal to one seven-thousandth
of a pound, or 1/480 troy ounce, or 64.79891 milligrams. The original English grain
unit based on the mass of a ripe grain barleycorn was larger the corresponding grain
units of France and other European nations which were based on the weight of the smaller
wheat grain.(NCI);