Main entry: alum
Definition: a double sulphate of aluminum and potassium that is used as an astringent (among other things)
Main entry: alum, alumna, alumnus, grad, graduate
Definition: a person who has received a degree from a school (high school or college or university)
Main entry: alum, potash alum, potassium alum
Definition: a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum
Main entry: alum, ammonia alum, ammonium alum
Definition: a white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum