To save this word, you'll need to log in.
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
Keep scrolling for more
Other Words from pentagonal
pentagonally \ pen-ˈta-gə-nᵊl-ē \ adverb
\ adverbExamples 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
See MoreThese 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.
Keep scrolling for more
Keep scrolling for more
Comments on pentagonal
What made you want to look up pentagonal? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
July 2020 Words of the Day Quiz
- Which is a synonym of mien?
Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridgedWords at Play
Ask the Editors
Word Games
Share pentagonal
Time Traveler for pentagonal
The first known use of pentagonal was in 1571
See more words from the same year