Understanding the meaning of alum

alum

/'æləm/

noun
a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum
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Similar:

potash alum potassium alum

type of:
double salt atomic number 13 aluminum aluminium al
noun
a person who has received a degree from a school (high school or college or university)
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Similar:

alumna alumnus grad graduate

type of:
scholar bookman scholarly person student
noun
a white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum
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Similar:

ammonia alum ammonium alum

type of:
al aluminium aluminum atomic number 13 double salt
noun
a double sulphate of aluminum and potassium that is used as an astringent (among other things)
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type of:
astringent drug astringent styptic

Explanation of alum

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