In 3-D, a parallelepiped is a Prism whose faces are all Parallelograms. The volume of a 3-D
parallelepiped is given by the Scalar Triple Product
In -D, a parallelepiped is the Polytope spanned by Vectors , ...,
in a Vector Space over the reals,
See also Prismatoid, Rectangular Parallelepiped, Zonohedron
Phillips, A. W. and Fisher, I. Elements of Geometry. New York: Amer. Book Co., 1896.