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

• milligram

2. (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)

• atomic number 12
• magnesium

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

• metric weight unit
• weight unit

2. (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)

• metal
• metallic element