Pyramid 
a massive monument with a square base and four triangular sides; begun by Cheops around 2700 BC as royal tombs in ancient Egypt • Syn: Great Pyramid, Pyramids of Egypt • Derivationally related forms: pyramidal, pyramidical, pyramid • Instance Hypernyms: memorial, monument • Member Holonyms: Seven Wonders of the Ancient World, Seven Wonders of the World
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