1. mg

noun. one thousandth (1/1,000) gram.


  • grain
  • metric grain
  • mcg
  • microgram
  • milligram
  • weight unit


  • bigness

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2. Mg

noun. a light silver-white ductile bivalent metallic element; in pure form it burns with brilliant white flame; occurs naturally only in combination (as in magnesite and dolomite and carnallite and spinel and olivine).


  • magnesium oxide
  • metallic element
  • magnesite
  • atomic number 12
  • carnallite
  • magnesium
  • magnesia
  • periclase
  • bitter spar
  • spinel
  • dolomite
  • metal

Example sentences of the word mg

1. Noun, singular or mass
One cup of medium grain brown rice has 20 mg of sodium and 1 cup of whole wheat pasta has about 1 g of sodium.

2. Noun, plural
If you consumed all your calories in the form of soup, this would equal over 3,000 mg of sodium per day, well over the 1,500 mg limit recommended by the American Heart Association 4.

3. Adjective
Historically, recommendations for reducing blood levels of LDL, or the "bad cholesterol," included a restriction of dietary cholesterol -- most commonly to less than 300 mg daily.