MILLIGRAM
milligram, mg
(noun) one thousandth (1/1,000) gram
Source: WordNet® 3.1
Etymology
Noun
milligram (plural milligrams)
An SI unit of mass, equivalent to one thousandth of a gram. Symbol: mg
Source: Wiktionary
Mil"li*gram, Mil"li*gramme, n. Etym: [F. milligramme; milli- milli- +
gramme. See 3d Gram.]
Definition: A measure of weight, in the metric system, being the thousandth
part of a gram, equal to the weight of a cubic millimeter of water,
or .01543 of a grain avoirdupois.
Source: Webster’s Unabridged Dictionary 1913 Edition