alum

alum
I. noun Etymology: Middle English, from Anglo-French alum, alun, from Latin alumen Date: 14th century 1. a potassium aluminum sulfate KAl(SO4)2•12H2O or an ammonium aluminum sulfate NH4Al(SO4)2•12H2O used especially as an emetic and as an astringent and styptic 2. any of various double salts isomorphous with potassium aluminum sulfate 3. aluminum sulfate II. noun Etymology: by shortening Date: 1930 alumnus, alumna III. abbreviation aluminum

New Collegiate Dictionary. 2001.

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  • Alum — unterscheidet: Alum Branch Alum Cave Branch Alum Cave Creek Alum Cave Run, ein Fluss im US Bundesstaat West Virginia Alum Creek Alum Dirt Branch, ein Fluss im US Bundesstaat Kentucky Alum Fork Alum Fork Saline River, ein Fluss im US Bundesstaat… …   Deutsch Wikipedia

  • alum — ALUM. s. m. Espece de mineral, certain suc condensé qui se trouve dans les mines. Alum de roche. alum de plume. veines, miniere d alum. alum bruslé. eau d alum. laver un livre dans de l eau d alum …   Dictionnaire de l'Académie française

  • Alum — Al um, n. [OE. alum, alom, OF. alum, F. alun, fr. L. alumen alum.] (Chem.) A double sulphate formed of aluminium and some other element (esp. an alkali metal) or of aluminium. It has twenty four molecules of water of crystallization. [1913… …   The Collaborative International Dictionary of English

  • Alum — Al um, v. t. To steep in, or otherwise impregnate with, a solution of alum; to treat with alum. Ure. [1913 Webster] || …   The Collaborative International Dictionary of English

  • alum — (n.) late 14c., whitish mineral salt used as an astringent, dye, etc., from O.Fr. alum, from L. alumen alum, lit. bitter salt, cognate with Gk. aludoimos bitter and perhaps with English ALE (Cf. ale) …   Etymology dictionary

  • alum — alum1 [al′əm] n. [ME & OFr < L alumen, alum: for IE base see ALE] 1. a double sulfate of a monovalent metal or radical (as sodium, potassium, or ammonium) with a trivalent metal (as aluminum, iron, or chromium): it is used as an astringent, as …   English World dictionary

  • Alum — Alum, Name, so v.w. Alam (s.d.), besonders bei den Großmogulen, so: 1) A. Ghir, so v.w. Aurengzeyb. 2) Schah A. I., Sohn des Vorigen, Großmogul 1707–1711. 3) A. Ghir, Großmogul 1754–1760. 4) Schah A. II., Sohn des Vorigen, Großmogul seit 1759;… …   Pierer's Universal-Lexikon

  • alum — (Ar., Mur.) m. Alumbre …   Enciclopedia Universal

  • alum — ► NOUN ▪ a crystalline compound consisting of a double sulphate of aluminium and potassium, used in dyeing and tanning. ORIGIN Latin alumen …   English terms dictionary

  • Alum — This article is about the chemical compound. For other uses, see Alum (disambiguation). Bulk alum Alum (  / …   Wikipedia

  • alum — alum1 /al euhm/, n. Chem. 1. Also called potash alum, potassium alum. a crystalline solid, aluminum potassium sulfate, K2SO4·Al2(SO4)3·24H2O, used in medicine as an astringent and styptic, in dyeing and tanning, and in many technical processes. 2 …   Universalium

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