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optical crown

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

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    Idiom of the Day

    in one's book
    according to one's own opinion
    In my book, she is the best teacher that we have ever had.



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    Bharat Ratna
    Bharat Ratna : pandurang vaman kane
    indologist, sanskrit scholar
    Year : 1963
    Region : maharashtra.      .. More >>
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