(inorganic chemistry) The green, crystalline salt of divalent iron and sulfuric acid, FeSO₄, used as a pigment, and in water treatment.

(US, dated, inorganic chemistry) iron(III) sulfate

(inorganic chemistry) The calcium salt of sulfuric acid, CaSO₄, the hydrates of which are known as gypsum or plaster of Paris, and the anhydrous mineral form being anhydrite.

(pharmacology) An antibacterial sulfonamide C₁₀H₁₁N₃O3S used alone or in combination with trimethoprim (as in the treatment of urinary tract infections or acute otitis media).

(inorganic chemistry) The sodium salt of sulfuric acid, Na₂SO₄; it is a mild laxative (as Glauber's salt), and is used in the manufacture of paper, detergents and many other products.

(US, inorganic chemistry) An inorganic chemical compound, (NH₄)₂SO₄, commonly used as a fertilizer and as a food additive (E517) used as an improving agent.

(inorganic chemistry) The insoluble lead salt or sulfuric acid, PbSO₄, that forms in lead-acid batteries

Of or pertaining to sulfamic acid or its derivatives

(American spelling, chemistry) Any salt or ester of sulfamic acid

(pharmacology) A combination of trimethoprim and sulfamethoxazole in the ratio of 1 to 5.