mcg

/ˌɛm si ˈdʒi/
noun
  1. A unit of weight equal to one millionth of a gram; used especially for measuring vitamins, minerals, and other nutrients.
    • This vitamin tablet contains 400 mcg of folic acid.
    • The doctor recommended a daily dose of 1000 mcg of vitamin B12.
    • Check the label to see how many mcg of vitamin D are in each serving.
Synonyms