Words · Familiar
alum
/ˈæləm/ · 4 letters · 4 distinct letters
- 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)