The word Rhomboid which means rhomb-like was commonly used in the 19th century for a parallelogram which was neither a rectangle nor a rhombus. Today it is more often used for a solid figure with six faces in which each face is a parallelogram and opposite faces in pairs lie in parallel planes. Some crystals are formed in 3D rhomboids. It is also sometimes called a rhombic prism. The term shows up frequently in science terminology referring to both its two and three dimensional meaning.
Euclid introduces the term in his Elements in Book I, Definition 22,
Euclid never uses the definition of rhomboid again and introduces the word parallelogram in Proposition 31 of Book I; "In parallelogrammic areas the opposite sides and angles are equal to one another, and the diameter bisects the areas." Heath suggests that rhomboid was an older term already in use .
Motif-Based Evidence That a Plastid Translocon Component Acts like a Rhomboid Protease Substrate in Yeast Mitochondria
Jul 01, 2011; Introduction rhomboid proteases have been assigned a variety of regulatory roles for cellular processes found in different...