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hydrogen fluoride

n.
1.a colorless poisonous corrosive liquid made by the action of sulphuric acid on calcium fluoride

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    Idiom of the Day

    count one's chickens before they're hatched
    to assume that something will be successful before it is certain
    "Don`t count your chickens before they`re hatched. You are spending your money before you have a job."



    1.
    If you drop something round at someone's house, you collect it.

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