Rhombus
Etymology

The word "rhombus" comes from Ancient Greek: ῥόμβος, romanized: rhómbos, meaning something that spins, which derives from the verb ῥέμβω, romanized: rhémbō, meaning "to turn round and round." The word was used both by Euclid and Archimedes, who used the term "solid rhombus" for a bicone, two right circular cones sharing a common base.
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