Question

alum

1

al.um  AHD[²l“…m]   DJ[6#l*m]  KK[6#l*m]
n.（名词）
    Any of various double sulfates of a trivalent metal such as aluminum, chromium, or iron and a univalent metal such as potassium or sodium, especially aluminum potassium sulfate, AlK(SO₄)₂·12H₂O, widely used in industry as clarifiers, hardeners, and purifiers and medicinally as topical astringents and styptics.
    明矾，白矾：一种三价金属双硫酸盐，如铝、铬、铁和单价金属如钾或钠，特别是铝钾硫酸盐AlK(SO₄)₂·12H₂O，在工业上广泛用作沉淀剂、硬化剂和净化剂，医学上用作局部收敛剂和止血剂
ORIGIN
1.Middle English
    中古英语
2.from Old French
    源自 古法语
3.from Latinalūmen}
    源自 拉丁语alūmen}
alum

2

alum 2  AHD[…-l¾m“]   DJ[*6lJm]  KK[*6lJm]
n.Informal （名词）【非正式用语】
    An alumna or alumnus.
    女校友、女毕业生，男校友、男毕业生