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.