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    heroin

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    heroin
    her‧o‧in /ˈherəʊɪn $ -roʊ-/ noun [uncountable]
     Date: 1800-1900
     Language: German
     Origin: Greek heros ( ⇨ hero); because taking it is said to make people feel heroic
    a powerful and illegal drug made from morphine
        be on/use/take heroin
        a heroin addict