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Definition of: rhombus
(rom′bəs) noun plural ·bus·es or ·bi (-bī) Geom.
1. An equilateral parallelogram having the angles usually, but not necessarily, oblique: A square may be considered as a special case of the rhombus.
2. A rhombohedron. [<L <Gk. rhombos spinning top, rhomb]
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