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