alum
US
UK alum n: (chemistry: mineral compound)
SC 白矾 bái fán
SC 明矾 bái fán，míng fán
alum n: US, informal, abbreviation (former student: alumnus, alumna) (缩写，非正式用法)
SC 校友 xiào yǒu
alum n: US, informal (TV show: former cast member)
SC 参与过之前演出的演员