Meaning of aluminum sulfate

alu'minum sul'fate

Pronunciation: [key]
— Chem. Chem.
  1. a white, crystalline, water-soluble solid, Al(SO), used chiefly as a water-purifying agent, as a mordant, and as a size in the manufacture of paper.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.