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boron trifluoride

n.
1.a pungent colorless gas

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Word of the Day

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  • boron counter tube
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  • boron chamber
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  • boron
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  • borodino
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  • borodin
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  • bornite
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  • bornholm disease
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  • borne in upon
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  • boronic
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  • borosilicate
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  • borough
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  • borough english
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  • borrelia
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  • borrelia burgdorferi
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  • borrow
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  • borrower's card
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  • at the ready
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  • fusion reactor
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  • genus hieracium
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    Idiom of the Day

    lick one's lips
    to show eagerness or pleasure about a future event
    I began to lick my lips when I heard about the chance to go on the training course.



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    Do we say 'the'with the names of groups of islands ?

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