Chem.
a crystalline solid, AlNH 4 (SO 4 ) 2 ·12H 2 O, used chiefly as a size in the manufacture of paper; alum. Also called ammonium alum, ammonia alum .
Chem.
a crystalline solid, AlNH 4 (SO 4 ) 2 ·12H 2 O, used chiefly as a size in the manufacture of paper; alum. Also called ammonium alum, ammonia alum .
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012