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half-life

n.
1.the time required for something to fall to half its initial value (in particular, the time for half the atoms in a radioactive substance to disintegrate)

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Word of the Day

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  • half-length
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  • half-intensity
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  • half-hourly
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  • half-hour
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  • half-holiday
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  • half-heartedly
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  • half-hardy
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  • half-free morel
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  • half-crazed
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  • half-cock
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  • half-light
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  • half-mast
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  • half-moon
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  • half-pay
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  • half-pint
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  • half-price
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  • half-relief
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  • half-seas-over
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  • half-size
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  • half-slip
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  • built-soap powder
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  • intumesce
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  • bush tit
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  • soft-cover
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  • deflated
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  • bush willow
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  • strobe light
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  • dower
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  • police investigation
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  • loathsomeness
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    Idiom of the Day

    up and about
    recovered from an illness
    My uncle has been up and about for a couple of days since he left the hospital.



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    My Account / Test History
    Element
    Element : mercury
    Symbol : hg
    Atomic no. : 80
    Melting Point (deg c) : -38.83
    Boiling Point (deg c) : 356.73
    Discoverer : prehistoric      .. More >>
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