alum

• Substantivo com vários sentidos: pode designar um composto cristalino branco de sulfato duplo de alumínio (como o de amônio ou de potássio), um ex-aluno de uma instituição de ensino ou o sulfato duplo de alumínio e potássio usado como adstringente.

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.

   Alúmen

   • 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.

   Ex-aluno

   • 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.

   Sinônimosalumnaalumnusgradgraduate