pentagonal

adjective
pen·​tag·​o·​nal | \pen-ˈta-gə-nᵊl \

Definition of pentagonal 

1 : having five sides and five angles

2 : having a pentagon as a cross section or as a base a pentagonal pyramid

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Other Words from pentagonal

pentagonally \ pen-​ˈta-​gə-​nᵊl-​ē \ adverb

Examples of pentagonal in a Sentence

Recent Examples on the Web

When designing the memorial plaza, Baines had the idea to place a large pentagonal flagpole in the middle, with each side representing a branch of the military, just like the granite base of the sculpture. Kyle Ringo, San Antonio Express-News, "San Antonio’s Vietnam Veterans Memorial built with thousands of small contributions," 27 May 2018 When designing the plaza, Baines had the idea to place a large pentagonal flagpole in the middle, with each side representing a branch of the military, just like the granite base of the sculpture. Kyle Ringo, Houston Chronicle, "San Antonio’s Vietnam Veterans Memorial built with thousands of small contributions," 27 May 2018 The new World Cup ball comes from historic stock: the original Telstar was the first ball to use the now-familiar truncasted icosahedrom — 12 black pentagonal panels and 20 white ones. Kevin Baxter, latimes.com, "A closer look at the technology inside the 2018 World Cup soccer ball," 21 May 2018 The mural’s background is in shades of blue, complemented by blue-and-white pentagonal shapes, white stars and red daisies. USA TODAY, "Years of persistence led to holiday honoring King," 12 Jan. 2018 The architects and designers came up with a unique pentagonal plan for the building that would maximize the site’s odd dimensions. Alicia Ault, Smithsonian, "Why Is the Pentagon a Pentagon?," 10 Apr. 2017 Across the lineup, LED running lamps, LED taillights, and that big, bold pentagonal grille are standard fare. Alexander Stoklosa, Car and Driver, "2017 Mazda 6," 13 Aug. 2017 Previously an impractical, boxy building, RUF replaced it with an ambitious pentagonal structure with a central courtyard. Oliver Giles, CNN, "How two architects are transforming Chinese villages," 26 June 2017 When rounded out by pickled red cabbage and mustard, apple purée, smoked egg yolk, and grilled bread, the flavors achieve a rare pentagonal balance. Becky Cooper, The New Yorker, "The Finch, a Michelin-Starred Neighborhood Spot," 4 Apr. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'pentagonal.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of pentagonal

1571, in the meaning defined at sense 1

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The first known use of pentagonal was in 1571

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