alum
noun(al-um)
a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum
Synonyms: potash alum, potassium alum,
alum
noun(al-um)
a person who has received a degree from a school (high school or college or university)
alum
noun(al-um)
a white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum
Synonyms: ammonia alum, ammonium alum,
alum
noun(al-um)
a double sulphate of aluminum and potassium that is used as an astringent (among other things)