名词 alum:

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

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

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

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

alumn.[化]白矾；明矾；<口>校友(=alumnus/alumna)Alumann.含锰锻造用铝合金alumenn.明矾(硫酸铝)alumnin.男毕业生；校友名词alumnus的复数形式.alumnal校友的,毕业生的alumbre明矾alumnol[化] β-萘酚磺酸铝,[医] β-苯酚二磺酸铝alummeln.镍铝合金alummaen.女毕业生; 女校友alumnaen.女毕业生；女校友名词alumna的复数形式.Alumino铝试剂