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convex lens

n.
1.lens such that a beam of light passing through it is brought to a point or focus

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  • Idiom of the Day

    take (something) to one's grave
    to carry a secret with you until you die
    The woman plans to take the secret about her sister to her grave.



    1.
    The defendant claimed that he was innocent and that his confession was ________.

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    Victor Mills, an inventor with Proctor & Gamble, invented the disposable diaper in 1961 because he didn't want to deal with his daughter's soiled diapers. You know them as Pampers.      .. More >>
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