600-cell
(geometry) A four-dimensional polytope, analogous to an icosahedron, whose 600 bounding facets are tetrahedra.
plural of Cogbill
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(botany) Belonging to the Schistochilaceae.
学生たちは、六百胞体の立体模型を作って、それを構成する四面体の配置を調べた。
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