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humic acid

n.
1.a dark brown humic substance that is soluble in water only at pH values greater than 2

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  • Idiom of the Day

    look down one's nose at (someone or something)
    to show your dislike of someone or something
    The boy always looks down his nose at the other members of his class.



    1.
    The ________ of free speech supports the notion of censor-free publication.

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