What does "mg" stand for?

The abbreviation "mg" stands for milligram, which is a unit of mass in the metric system. One milligram is equal to one-thousandth of a gram. The milligram is commonly used in fields such as medicine, nutrition, and science to measure small quantities of substances, such as medication dosages or the amount of certain nutrients in food. The clarity of measurement in these fields is crucial, which is why the milligram is widely recognized and employed.

While other options denote units of measurement—megagram (which is 1,000 grams), milliliter (a unit of volume), and microgram (which is one-millionth of a gram)—they represent different scales and measurements, hence they are not applicable as the definition for "mg". Understanding the specific meaning of "mg" as milligram is essential for working accurately in contexts that involve precise measurements.