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melon dome

American  

noun

Architecture.

  1. a hemispherical dome with a circular base and a ribbed vault divided into individual webs, each of which has a baseline curved segmentally in plan and also curved in elevation.

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.