alum

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Definitions

Noun
a white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum
Noun
a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum
Noun
a person who has received a degree from a school (high school or college or university)
Noun
a double sulphate of aluminum and potassium that is used as an astringent (among other things)

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