noun
parallelepiped
Mathematical term for a six-faced polyhedron whose faces are parallelograms. Used in geometry and linear algebra.
平行六面体の体積は、三つの辺ベクトルのスカラー三重積で求められる。
The volume of a parallelepiped is given by the scalar triple product of its three edge vectors.
Compound of 平行 (parallel) + 六面 (six faces) + 体 (body, solid). A calque from Western mathematical terminology.