出典:Wiktionary
From tessara- (“four-”) + Ancient Greek ἀκτίς (aktís, “ray”).
tesseract (複数形 tesseracts)
出典:Wikipedia
出典:『Wikipedia』 (2011/07/22 09:02 UTC 版)
In geometry, the tesseract, also called an 8-cell or regular octachoron or cubic prism, is the four-dimensional analog of the cube. The tesseract is to the cube as the cube is to the square. Just as the surface of the cube consists of 6 square faces, the hypersurface of the tesseract consists of 8 cubical cells. The tesseract is one of the six convex regular 4-polytopes.