Milligram (mg)
Definition: A milligram (symbol: mg) is one thousandth of a gram and one millionth of a kilogram. It is a metric unit used for extremely small masses.
History/origin: The milligram comes directly from the metric system's decimal structure, making it a natural small subdivision of the gram for science, medicine, and laboratory work.
Current use: Milligrams are used for medicine dosages, vitamins, chemical compounds, and very small quantities of ingredients where grams would be too coarse.


