
The Tweel (a portmanteau of tire and wheel) is an airless tire design concept developed by the French tire company Michelin. Its significant advantage over pneumatic tires is that the Tweel does not use a bladder full of compressed air, and therefore it cannot burst, leak pressure, or become flat. Instead, the Tweel assembly`s inner hub connects ....
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http://en.wikipedia.org/wiki/Tweel
[A Martian Odyssey] Tweel (also referred to as a `Tweerl`, the exact pronunciation of the word is said to be impossible for humans) is a fictional extraterrestrial from the planet Mars, featured in two short stories by Stanley G. Weinbaum. The alien was featured in A Martian Odyssey, first published in 1934, and Valley of Dreams four months...
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http://en.wikipedia.org/wiki/Tweel_(A_Martian_Odyssey)

• (n. & v.) See Twill.
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http://thinkexist.com/dictionary/meaning/tweel/
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