From Longman Dictionary of Contemporary Englishmilligrammil‧li‧gram (also milligramme British English) /ˈmɪləɡræm/ noun [countable] (written abbreviation mg) TMa unit for measuring weight. There are 1,000 milligrams in one gram.
Examples from the Corpus
milligram• Health agencies continue to recommend the 300 milligram per day limit, and it is required on food labels.• At the moment protein A is so scarce it costs between £5 and £10 a milligram.• Halcion was first sold in this country in 1982 at dosages up to half a milligram for 14 days use. 