pentagonal

adjective
pen·​tag·​o·​nal | \ pen-ˈta-gə-nᵊl How to pronounce pentagonal (audio) \

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 How to pronounce pentagonally (audio) \ adverb

Examples of pentagonal in a Sentence

Recent Examples on the Web Therrien says the discovery came in a failed attempt to synthesize pentagraphene, a sheet of carbon atoms bound in pentagonal rings that has been predicted but never created. W. Wayt Gibbs, Science | AAAS, "The next graphene? Shiny and magnetic, a new form of pure carbon dazzles with potential," 12 Nov. 2019 Just before 8 pm on February 9, 2018, high in the northeastern mountains of South Korea, Sang-jin Oh was sitting on a plastic chair a few dozen rows up from the floor of Pyeongchang's vast, pentagonal Olympic Stadium. Andy Greenberg Excerpt, Wired, "The Untold Story of the 2018 Olympics Cyberattack, the Most Deceptive Hack in History," 17 Oct. 2019 The proteins of the human papilloma viruses, for instance, were arranged in five-fold pentagonal structures, rather than hexagonal ones. Quanta Magazine, "The Illuminating Geometry of Viruses," 19 July 2017 The 30-story pentagonal tower with the internationally famous designer and locally prominent footprint in Baltimore’s Inner Harbor will no longer be known as the World Trade Center. Meredith Cohn, baltimoresun.com, "What has five sides and one new name? Baltimore's World Trade Center gets rebranded," 5 June 2019 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

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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Time Traveler for pentagonal

Time Traveler

The first known use of pentagonal was in 1571

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Cite this Entry

“Pentagonal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pentagonal. Accessed 5 Aug. 2020.

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More from Merriam-Webster on pentagonal

Rhyming Dictionary: Words that rhyme with pentagonal

Spanish Central: Translation of pentagonal

Nglish: Translation of pentagonal for Spanish Speakers

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