Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps

Noun: magnesium  mag'nee-zee-um or mag'nee-zhum
  1. 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)
    - Mg, atomic number 12

Derived forms: magnesiums

Type of: metal, metallic element

Part of: bitter spar, carnallite, dolomite, magnesia, magnesite, magnesium oxide, olivine, periclase, spinel

Encyclopedia: Magnesium