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diopter

n.
1.a unit of measurement of the refractive power of a lens which is equal to the reciprocal of the focal length measured in meters

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Word of the Day

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  • diophantus
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  • dioon
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  • dionysus
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  • dionysius the elder
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  • dionysius
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  • dionysian
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  • dionysia
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  • dionaea muscipula
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  • dionaea
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  • diomedeidae
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  • dior
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  • diorama
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  • diorite
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  • dioscorea
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  • dioscorea alata
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  • dioscorea batata
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  • dioscorea bulbifera
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  • dioscorea elephantipes
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  • dioscorea paniculata
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  • dioscorea trifida
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  • d. w. griffith
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  • genus cola
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  • shame plant
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  • uninsurability
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  • allopatric
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  • calandrinia ciliata
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  • undreamed
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  • lipaemia
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  • dissuasive
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  • bespoken
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    Idiom of the Day

    shotgun wedding
    a forced wedding
    The young couple were forced into a shotgun wedding by the girl's father.



    1.
    It is not (a) / such a good book (b) / that I expected. (c) / No error (d)

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