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

Other Words from pentagonal

pentagonally \ pen-​ˈta-​gə-​nᵊl-​ē How to pronounce pentagonal (audio) \ adverb

Examples of pentagonal in a Sentence

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

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.

First Known Use of pentagonal

1571, in the meaning defined at sense 1

Learn More About pentagonal

Time Traveler for pentagonal

Time Traveler

The first known use of pentagonal was in 1571

See more words from the same year

Dictionary Entries Near pentagonal

pentagon

pentagonal

pentagon crab

See More Nearby Entries 

Statistics for pentagonal

Cite this Entry

“Pentagonal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pentagonal. Accessed 12 Aug. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More from Merriam-Webster on pentagonal

Nglish: Translation of pentagonal for Spanish Speakers

WORD OF THE DAY

Test Your Vocabulary

Commonly Confused Words Quiz

  • vector image of a face with thought expression
  • I went to the ______ store to buy a birthday card.
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!