"Parallelepiped" is now usually pronounced / ˌ p ær ə l ɛ l ɪ ˈ p ɪ p ɛ d/, / ˌ p ær ə l ɛ l ɪ ˈ p aɪ p ɛ d/, or /- p ɪ d/ traditionally it was / ˌ p ær ə l ɛ l ˈ ɛ p ɪ p ɛ d/ PARR-ə-lel- EP-i-ped in accordance with its etymology in Greek παραλληλεπίπεδον parallelepipedon, a body "having parallel planes". The rectangular cuboid (six rectangular faces), cube (six square faces), and the rhombohedron (six rhombus faces) are all specific cases of parallelepiped.
In Euclidean geometry, the four concepts- parallelepiped and cube in three dimensions, parallelogram and square in two dimensions-are defined, but in the context of a more general affine geometry, in which angles are not differentiated, only parallelograms and parallelepipeds exist. By analogy, it relates to a parallelogram just as a cube relates to a square. In geometry, a parallelepiped is a three-dimensional figure formed by six parallelograms (the term rhomboid is also sometimes used with this meaning). Hexahedron with parallelogram faces Parallelepiped