alum

Primary Meanings of alum

1.	n	a double sulphate of aluminum and potassium that is used as an astringent (among other things)
2.	n	a person who has received a degree from a school (high school or college or university)

Full Definitions of alum

1

n a double sulphate of aluminum and potassium that is used as an astringent (among other things)

Type of:: astringent, astringent drug, styptic
a drug that causes contraction of body tissues and canals

n a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum

Synonyms:: potash alum, potassium alum

Type of:: Al, aluminium, aluminum, atomic number 13
a silvery ductile metallic element found primarily in bauxite; double salt
a solution of two simple salts that forms a single substance on crystallization

n a white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum

Synonyms:: ammonia alum, ammonium alum

Type of:: Al, aluminium, aluminum, atomic number 13
a silvery ductile metallic element found primarily in bauxite; double salt
a solution of two simple salts that forms a single substance on crystallization

2

n a person who has received a degree from a school (high school or college or university)

Synonyms:: alumna, alumnus, grad, graduate

Types:: Ivy Leaguer
a student or graduate at an Ivy League school; old boy
a former male pupil of a school

Type of:: bookman, scholar, scholarly person, student
a learned person (especially in the humanities); someone who by long study has gained mastery in one or more disciplines