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potassium alum

DEFINITIONS OF: potassium alum

1

n a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum

Synonyms:
alum, potash alum
Type of:
Al, aluminium, aluminum, atomic number 13
a silvery ductile metallic element found primarily in bauxite
double salt
a solution of two simple salts that forms a single substance on crystallization
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