alum

• Nom ayant plusieurs sens : peut désigner un composé cristallin blanc de double sulfate d'aluminium (par exemple, l'ammoniacal ou le potassium), un diplômé d'un établissement d'enseignement, ou le double sulfate d'aluminium et de potassium utilisé comme astringent.

A noun with multiple meanings: it can refer to a white crystalline double sulfate of aluminum (such as the ammonium or potassium variant), a person who has graduated from a school, or a double sulphate of aluminum and potassium used as an astringent.

1. Chemical compoundC1formalscientific

   A white crystalline double sulfate of aluminum, such as the ammonium or potassium double sulfate, used in various applications including water purification and as an astringent.

   Alun (composé chimique)

   • Alum is commonly used in traditional water treatment processes.
   • The chemist prepared a solution of potassium alum for the experiment.
   • Alum crystals are often used in deodorant products.

2. Graduate or former studentB1informalamerican

   A person who has received a degree from a school, college, or university.

   Ancien élève ou ancien étudiant

   • She is an alum of Harvard University.
   • The alumni association invited all alums to the reunion.
   • As a proud alum, he donates to his old school every year.

   Synonymesalumnaalumnusgradgraduate