The word "rhombus" comes from the Greek ῥόμβος (rhombos), meaning something that spins,[2] which derives from the verb ρέμβω (rhembō), meaning "to turn round and round"
The definition of lozenge is not strictly fixed, and it is sometimes used simply as a synonym for rhombus. Most often, though, lozenge refers to a thin rhombus—a rhombus with acute angles of 45°. The lozenge shape is often used in parquetry and as decoration on ceramics, silverware and textiles. It also features in heraldry and playing cards.
The lozenge motif dates as far back as the Neolithic and Paleolithic period in Eastern Europe and represents a sown field and female fertility. The ancient lozenge pattern often shows up in Diamond vault architecture, in traditional dress patterns of Slavic peoples, and in traditional Ukrainian embroidery. The lozenge pattern also appears extensively in Celtic art, art from the Ottoman Empire, and ancient Phrygian art.
text and pictures taken from Wikipedia. They rock. I do not own any of these words or pictures.
http://en.wikipedia.org/wiki/Roger_Penrose