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ammonium alum

n.
1.a white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum

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  • ammonium
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  • ammonitic
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  • ammonium carbamate
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  • ammonium carbonate
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  • ammonium chloride
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  • ammonium hydroxide
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  • ammonium ion
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  • ammonium nitrate
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    Idiom of the Day

    arm and a leg
    a large amount of money
    The man's new car cost him an arm and a leg.



    1.
    I must start (a) / at dawn (b) / to reach the station in time. (c) / No error (d)

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