Parallelopiped vs. Parallelepiped — What's the Difference?

Alternative form of parallelepiped

In geometry, a parallelepiped is a three-dimensional figure formed by six parallelograms (the term rhomboid is also sometimes used with this meaning). By analogy, it relates to a parallelogram just as a cube relates to a square.

A solid, the faces of which are six parallelograms, the opposite pairs being parallel, and equal to each other; a prism whose base is a parallelogram.

A solid with six faces, each a parallelogram and each being parallel to the opposite face.

A prism whose bases are parallelograms

(geometry) A solid figure, having six faces, all parallelograms, all opposite faces being similar and parallel.

A prism whose bases are parallelograms.

A prism whose bases are parallelograms