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Queterract is a 4th-dimensional sphere. "Kwetwer-" is the Indo-European root for "four" and "act" coming from the latin root "ἀκτίς" (aktis) meaning "ray".

Just like a tesseract is comprised of "tessera-", meaning "four" as well, and "ἀκτίς" (aktis), a queterract is comprised of what's stated above.
A tesseract is to a cube as a queterract is to a sphere.
by BigMartin58 February 12, 2014
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