noun, Architecture.
an arch having a more or less flat intrados and extrados with voussoirs radiating from a center below the arch.


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    adjective phrase Very flat: The car was squashed flat as a pancake [1761+; the form flat down as pancakes is found by 1611] Extremely level, especially too much so. For example, There are no hills; this terrain is flat as a pancake. This simile dates from the 1500s and has survived its contemporary, flat as […]

  • Flat-ass

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