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up quark

n.
1.a stable quark with an electric charge of +2/3 and a mass 607 times that of an electron

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Word of the Day

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  • up on
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  • up in the air
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  • up here
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  • up and down
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  • unzip
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  • unyoke
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  • unyieldingness
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  • unyielding
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  • unwritten law
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  • up the stairs
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  • up to
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  • up to her neck
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  • up to his neck
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  • up to my neck
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  • up to now
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  • up to our necks
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  • up to their necks
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  • up to your neck
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  • up-and-coming
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  • aerophile
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  • win
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  • bulk modulus
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  • greenhouse gas
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    Idiom of the Day

    pick at (something)
    to eat only little bits of something
    The boy is sick and will only pick at his food.



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    If you're as fit as a fiddle, your health in OK, but not excellent.

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    The Burramundy, a fish, grows up as a male, but after 2 years or so, it turns into a female to breed.      .. More >>
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