Get the FREE one-click dictionary software for Windows
or the iPhone/iPad and Android apps
Noun: potassium alum  pu'ta-see-um 'a-lum
  1. A white crystalline double sulphate of aluminium: the potassium double sulphate of aluminium
    "Potassium alum is commonly used in water purification";
    - alum, potash alum

Derived forms: potassium alums

Type of: Al, aluminium [Brit, Cdn], aluminum [N. Amer], atomic number 13, double salt

Encyclopedia: Potassium alum