alum

FREQ #40016

n. 明矾, 矾, 校友 [化] 明矾; 钾铝明矾

发音

其它
其它
/ˈæl.əm/
/əˈlʌm/

词形变化

alums 复数 alumni 复数 alumed aluming alums 三单 aluming 现在分词 alumed 过去式 alumed 过去分词

别名

alumn

释义与例句

n.
  1. 1.

    An astringent salt, usually occurring in the form of pale crystals, much used in the dyeing and tanning trade and in certain medicines, and now understood to be a double sulphate of potassium and aluminium (K₂SO₄·Al₂(SO₄)₃·24H₂O).

    可数 不可数
  2. 2.

    Any similar double sulphate in which either or both of the potassium and aluminium is wholly or partly replaced by other univalent or tervalent cations.

    明矾

    可数 不可数 化学
  3. 1.

    A past attendee or graduate (of any gender) of a college, university or other educational institution.

    加拿大 美国

    1961 Spring, Anchora of Delta Gamma, Volume LXXVII, No. 3, page 59, Evanston-North Shore alums are happy to open their homes to Sigma actives for special social events.

v.
  1. 1.

    To steep in, or otherwise impregnate with, a solution of alum; to treat with alum.

    及物

词汇关系

名词

同义词 3

graduate grad potash alum

上位词 7

al scholar aluminum aluminium astringent double salt styptic

下位词 4

alumnus alumna old boy Ivy Leaguer

相关短语

alum rock [机] 明矾岩 alum stone [化] 明矾石 alum stones alum shale [化] 明矾页岩 alum slate 明矾板岩 alum schist [化] 明矾页岩 Alum Rock sodium alum [化] 钠矾 [医] 钠明矾(硫酸钠铝) potash alum [化] 明矾 Roman alum [医] 罗马明矾 rock alum [化] 明矾石; 钾明矾石 soda alum [化] 钠矾 feather alum [化] 铁明矾; 毛矾石 plume alum

词源

From Middle English alum, alum, alym, alyme, from Anglo-Norman alum, alun, from Latin alūmen.

来源：wiktionary