n.

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

同義詞：ammonia alumammonium alum

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

同義詞：potassium alumpotash alum

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

同義詞：alumnusalumnagraduategrad

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

1. The university has a large network of alums who support its activities.
   這所大學擁有龐大的校友網(wǎng)絡，支持著學校的各項活動。
2. Many alums returned to their alma mater for the annual reunion.
   許多校友回到母校參加年度聚會。