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cofactor

n.
1.a substance (as a coenzyme) that must join with another to produce a given result

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Word of the Day

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    Idiom of the Day

    hold on to (someone or something)
    to continue to hold or keep something, to hold someone or something tightly
    You should hold on to your bag when you are in the bus or someone may steal it.



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    Deleterious

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