sulfate Definition

a salt or ester of sulfuric acid

a divalent group or anion SO4 characteristic of sulfuric acid and the sulfates

to treat or combine with sulfuric acid or a sulfate

a white salt Al2(SO4)3 usually made by treating bauxite with sulfuric acid and used in making paper, in water purification, and in tanning

a colorless crystalline salt (NH4)2SO4 used chiefly as a fertilizer

a crystalline insoluble compound BaSO4 that is used especially as a pigment and extender, as a filler (as in fluids used in gas and oil drilling), and as a substance opaque to X-rays in medical photography of the digestive tract

a white salt CaSO4 that occurs especially as anhydrite, gypsum, and plaster of paris and that in hydrated form is used as a building material and in anhydrous form is used as a drying agent

a sulfate of copper; especially : the normal sulfate that is white in the anhydrous form but blue in the crystalline hydrous form CuSO4·5H2O and that is often used as an algicide and fungicide

a salt obtained usually in its bluish-green hydrated form FeSO4·7H2O that is used especially in making inks, pigments, and other iron salts and in medicine for treating anemia caused by iron deficiency

a sulfate of magnesium: such as

a white salt MgSO4 used in medicine and in industry

epsom salts