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refraction

n.
1.the change in direction of a propagating wave (light or sound) when passing from one medium to another
2.the amount by which a propagating wave is bent

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Word of the Day

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    Idiom of the Day

    feel out (someone) or feel (someone) out
    to talk or act carefully with someone in order to find out what he or she thinks
    I will feel out my boss this weekend about my chance for a promotion.



    1.
    You'd ________ not do it again or you'll be in real trouble.

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