Look up: Alum

1. 
   alum
   [n] - a white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum 2. [n] - a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum 3. [n] - a double sulphate of aluminum and potassium that is used as an astringent (among other things)
   Found on http://www.webdictionary.co.uk/definitio
   
   
2. 
   Alum
   An alum is a double salt comprising a sulphate salt of a monovalent element, with the sulphate salt of a trivalent element. The most well known example is potash alum (aluminium potassium sulphate) KAl(SO4)2.12H2O which is used to clear murky water.
   Found on http://www.ch.ic.ac.uk/vchemlib/mol/glos
   
   
3. 
   Alum
   An alum is a double salt comprising a sulphate salt of a monovalent element, with the sulphate salt of a trivalent element. The most well known example is potash alum (aluminium potassium sulphate) KAl(SO4)2.12H2O which is used to clear murky water.
   Found on http://www.chemicalglossary.net/definiti
   
   
4. 
   Alum
   technically, a double sulfate of ammonium or a univalent or trivalent metal but commonly used to denote aluminum sulfate (Al2(SO4)3.
   Found on http://www.chemicalglossary.net/definiti
   
   
5. 
   Alum
   Chemicals used to 'fix' coloured dyes from plants and animals to a piece of cloth - so it will not wash out or fade over time. This has been found in large amounts on the North Yorkshire coast in the shale type rocks. There are similar chemical compounds based on the substitution of Potassium (K) by Sodium (Na) and Ammonium (NH4).
   Found on http://www.keystothepast.info/durhamcc/k
   
   
6. 
   Alum
   Also called hydrated aluminium sulphate or papermaker's alum. A papermaking chemical that's typically used when adding rosin size to pulp, alum imparts water-resistant properties to paper. In practical terms, it keeps paper from clinging to the presses.
   Found on http://www.britishprint.com/tw/glossary.
   
   
7. 
   Alum
   Al'um noun [ Middle English alum , alom , Old French alum , French alun , from Latin alumen alum.] (Chemistry) 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. » Common alum is the double sulphate of aluminium and potassium. It is whit ...
   Found on http://www.encyclo.co.uk/webster/A/64
   
   
8. 
   Alum
   Al'um transitive verb To steep in, or otherwise impregnate with, a solution of alum; to treat with alum. Ure.
   Found on http://www.encyclo.co.uk/webster/A/64
   
   
9. 
   alum
   <chemistry> A double sulphate formed of aluminium and some other element (especially. An alkali metal) or of aluminium. It has twenty-four molecules of water of crystallization. ... Common alum is the double sulphate of aluminium and potassium. It is white, transparent, very astringent, and crystallizes easily in octahedrons. The term is exten ...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
10. 
    alum
    noun a double sulphate of aluminum and potassium that is used as an astringent (among other things)
    Found on http://wordnet.princeton.edu/perl/webwn?
    
    
11. 
    alum
    potash alum noun a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum
    Found on http://wordnet.princeton.edu/perl/webwn?
    
    
12. 
    alum
    ammonium alum noun a white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum
    Found on http://wordnet.princeton.edu/perl/webwn?
    
    
13. 
    Alum
    `Alum`, refers to a specific chemical compound and a class of chemical compounds. The specific compound is the hydrated aluminum potassium sulfate with the formula KAl(SO4)2.12H2O. The class of compounds known as alums have the related stoichiometry, AB(SO4)2.12H2O.
    Found on http://en.wikipedia.org/wiki/Alum
    
    
14. 
    alum
    (al´әm) a local astringent and styptic, prepared as an ammonium (ammonium alum) or potassium (potassium alum) compound; also used as an adjuvant in adsorbed vaccines and toxoids.
    Found on http://www.mercksource.com/pp/us/cns/cns
    
    
15. 
    Alum
    • (v. t.) To steep in, or otherwise impregnate with, a solution of alum; to treat with alum. • (n.) 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.
    Found on http://thinkexist.com/dictionary/meaning
    
    
16. 
    alum
    any of a group of hydrated double salts, usually consisting of aluminum sulfate, water of hydration, and the sulfate of another element. A whole ... [5 related articles]
    Found on http://www.britannica.com/eb/a-z/a/54
    
    
17. 
    alum
    A double salt comprising sulfates of two metals (one monovalent, one trivalent) combined with 12 molecules of water of crystallization: M^IM^III(SO₄)₂.12H₂O. The monovalent metal is commo...
    Found on http://www.daviddarling.info/encyclopedi
    
    
18. 
    ALUM
    A term commonly, but mistakenly, applied in the paper industry to various qualities of Aluminium Sulphate.
    Found on http://www.fiskprinters.co.uk/glossary.a
    
    
19. 
    alum
    alum (ăl'um) , any one of a series of isomorphous double salts that are hydrated sulfates of a univalent cation (e.g., potassium, sodium, ammonium, cesium, or thallium) and a trivalent cation (e.g., aluminum, chromium, iron, manganese, cobalt, or titanium). The name alum commonly refers to...
    Found on http://www.infoplease.com/ce6/sci/A08035