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An invention conceived by Dr. Emmett L. Brown on November 5, 1955 which makes time travel possible.
Doc: "This is what makes time travel possible! The flux capacitor!"

Marty: impressed Flux capacitor!
by Phuyuck '74 March 23, 2004
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a electrical capacitor capable of storing the 1.21 gWe generated by a nuclear reaction, or lightning bolt. Unique due to its size, as conventional capacitors that can handle such energy would take up the space of a small apartment complex. The device has nothing to directly with time travel, merely allowing the 1.21 gWe to be used all at once, and in phase.
"And that's when you came up with the idea for the Flux Capacitor...

Which... is what makes time travel possible." - Marty McFly
by Ornament September 21, 2010
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A fictional device from the movie Back to the Future that allows travel through time. It can also be used as a scapegoat for computer problems when people ask dumb questions.
Some guy called me to ask me why his computer wasn't working during a power outage, so I told him his flux capacitor was broken.
by mikm October 23, 2005
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A 3-pronged device which, when properly combined with 1.21 jigawatts of electricity, grants access to the fourth dimension. (The ability to travel through time.)
Just tape the flux capacitor to a car, a toaster, or any other mechanical item you can think of, and you can travel through time with it!
by Dark Chaos September 04, 2004
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In the, "Back to the Future," series, a device that, when installed into a moving vehicle that can move at or above 88 miles per hour, allows a person to travel through time. The classic case of such a time travelling vehicle is the Delorian.
Dr. Emmet Brown struck his head in the bathroom only to find that he had come up with the idea for a Flux Capacitor
by Xandero June 28, 2006
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The part of a woman's thong that is showing above her pants. Usually used to reference the presesce of all three strips. Thus, looking like the 'flux capacitor.'
"Hey dude, look at the flux capacitor on that hottie!"
by hefty beef March 15, 2004
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