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optical flint

n.
1.optical glass of high dispersion and high refractive index

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Word of the Day

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    Idiom of the Day

    put a damper on (something)
    to discourage something, to spoil a person`s fun
    The death of the company president put a damper on the anniversary celebrations.



    1.
    If you talk the hind legs off a donkey, you talk plainly and honestly.

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