milligram

noun

1. a unit of mass or weight equal to one thousandth of a gram, and equivalent to 0.0154 grain. Abbreviation: mg

noun

1. one thousandth of a gramSymbol: mg

n.also milligramme, 1802, from French milligramme; see milli- + gram. n.

1. A metric unit of mass equal to one thousandth (10-3) of a gram.

1. A unit of mass or weight in the metric system equal to 0.001 gram. See Table at measurement.