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toxoid

n.
1.a bacterial toxin that has been weakened until it is no longer toxic but is strong enough to induce the formation of antibodies and immunity to the specific disease caused by the toxin

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    Idiom of the Day

    a straw in the wind
    a small sign of what may happen in the future
    When the company began to reduce expenses it was a straw in the wind as to what would happen in the future.



    1.
    He says that (a) he has a car (b) beside a scooter. (c) No error (d)

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    Science Facts
    Some animals respond to small amounts of poisonous gas and have been used as early warning systems. German soldiers kept cats in the trenches of the First World War to smell gas, and British miners kept budgies in cages because they died quickly if gas escaped into the mine.      .. More >>
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