👉 The term "parallelepipedon" is not commonly used in everyday language, but it can be related to a three-dimensional shape that has two parallel faces. A parallelepipedon is often described as having four rectangular sides and four triangular faces, where each face is a right-angled triangle with the opposite side being equal to the length of the base. This shape is named after the Greek word "parallelogram" which means "equal sides".