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A polygon with seven sides and seven angles.

[Latin heptagōnon, from Greek heptagōnos, having seven angles : hepta-, hepta- + -gōnos, angled; see -gon.]

hep·tag′o·nal (-tăg′ə-nəl) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


[hepˈtægənəl] ADJheptagonal
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005
References in periodicals archive ?
It is made from 7 steel plates - each 78 feet high and 8 feet wide - arranged in a heptagonal or seven-sided shape.
The company uses a heptagonal reflector split by a layer of PMMA diffusion film for diffusing light.
Results show that we're ready for a promising season," said a jubilant Roglic after lifting the 24kt gold-plated heptagonal trophy representing the union of the seven Emirates.
The foramen magnum was studied, and eight varying morphological shapes were identified and reported: egg-shape; heptagonal shape; hexagonal shape; irregular; oval shape; pentagonal shape; round shape; and tetragonal shape.
With the support of a German nonprofit called ThingsCon and a research fellowship from Mozilla, Bihr created a heptagonal Trustable Tech Mark awarded based on consistent criteria that would indicate to consumers whether the companies behind their smart speakers or connected appliances should be considered reliable stewards of sometimes intimate information about their lives.
The new logo and trophy - both heptagonal to illustrate all seven emirates Abu Dhabi, Dubai, Sharjah, Ajman, Fujairah, Ras Al Khaimah, and Umm Al Quwain involved in the race.
(2009), assessing the corneal endothelium of pigs, established by SEM that most of the cells were hexagonal (61.7 [+ or -] 8.5% for the central area and 53.2 [+ or -] 7.0% for the peripheral area), with the presence of pentagonal cells (21.3 [+ or -] 5.8% and 28.9 [+ or -] 5.1% for the center and the periphery, respectively) and heptagonal cells (11.0 [+ or -] 6.4% for the center and 18.1 [+ or -] 4.8% for the periphery).
It was enclosed by a small heptagonal railing encompassing ten yards of ground around the stone, with the stone forming one end of the railing.
The four countries in the Quad (the US, Australia, Japan and India) need to include Vietnam, Indonesia and the Philippines, thereby forming a Heptagonal Alliance.
Vargas Lugo's concrete Ovipositor is a heptagonal representation of this minuscule, yet vital, organ.
The antenna is a circular monopole antenna with a heptagonal shaped slot cut in it.
At the time, the 50p was the only heptagonal coin in the world, and according to the Royal Mint, in 2014 there were an estimated 948 million 50p coins in circulation.