Definition of "pyramidion" [pyr•a•mid•i•on]

• The small pyramid which crowns or completes an obelisk. (noun)

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• ""The heaviest damage appears to be concentrated at the very top of the monument, in what is called the pyramidion, where large cracks of up to 1 1/4 inch wide developed through stone and mortar joints," said Bob Vogel, superintendent of the National Mall and Memorial Parks."
• ""The heaviest damage appears to be concentrated at the very top of the monument, in what is called the pyramidion, where large cracks of up to 1 1/4 inch wide developed through stone and mortar joints," Vogel said."
• "Seavers screamed and released his grip on the canister, which clanked down the pyramidion and disappeared into the darkness."