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optical device

n.
1.a device for producing or controlling light

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Word of the Day

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  • optical crown
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    Idiom of the Day

    take out (something) or take (something) out
    to remove something from somewhere, to extract something
    The teacher asked us to take out our books. I took out some onions from the refridgerator.



    1.
    He has a very refined vocabulary and prefers to use a ________ rather than a more common and vulgar word.

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