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pentagonal

adjective

pen·​tag·​o·​nal pen-ˈta-gə-nᵊl How to pronounce pentagonal (audio)
1
: having five sides and five angles
2
: having a pentagon as a cross section or as a base
a pentagonal pyramid
pentagonally adverb

Example Sentences

Recent Examples on the Web The line's new refillable lipsticks are a start: The cases retain the same pentagonal columnar shape as her very first launches, but this time in sturdy, reusable metal. Jessica Chia, Allure, 14 Feb. 2022 Now, replace the Danner Tanicus outsole with a pentagonal-patterned, custom Vibram® outsole made to grip various terrain, both indoors and outdoors. Breanna Wilson, Forbes, 13 Sep. 2021 The result is a cluster of pentagonal buildings with angles designed to deflect wind. David Nikel, Forbes, 10 Apr. 2021 From its unique double headlights and gigantic pentagonal grille to its slippery bodywork and sloping roofline, the all-new 2021 Genesis G80 is a rolling beauty. Eric Stafford, Car and Driver, 19 Feb. 2021 For example, a soccer ball has 20 white hexagonal and 12 black pentagonal patches for a total of 32 faces, as well as 90 edges and 60 vertices. quantamagazine.org, 26 Jan. 2021 Kites and darts form the basic units of another kind of Penrose tiling for which Conway proved many interesting theorems about their uncountability, pentagonal symmetry and their other connections to the golden ratio. Quanta Magazine, 20 Nov. 2020 Its pentagonal grille shape is familiar from elsewhere in the Acura lineup, and the MDX's proportions look sharper and more athletic compared with the current model. Joey Capparella, Car and Driver, 1 Oct. 2020 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, 12 Nov. 2019 See More

Word History

First Known Use

1571, in the meaning defined at sense 1

Time Traveler
The first known use of pentagonal was in 1571

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