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gram definition: A gram is a unit of measure in the metric system that equals one thousandth of a kilogram. (noun) An example of a gram is .035 ounces or four pinches of salt. ...
(December 2009). A gram per litre or gram per liter (g/L or g/l) is a unit of measurement of mass concentration that shows how many grams of a certain substance are present in one litre of a usually liquid or gaseous mixture.It is not an SI unit because it contains the non-SI unit litre.December 2009). A gram per litre or gram per liter (g/L or g/l) is a unit of measurement of mass concentration that shows how many grams of a certain substance are present in one litre of a usually liquid or gaseous mixture. It is not an SI unit because it contains the non-SI unit litre.