heptagon

[hep-tuh-gon]
noun
a polygon having seven angles and seven sides.

Origin:
1560–70; < Greek heptágōnos seven-cornered. See hepta-, -gon

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To heptagon
Collins
World English Dictionary
heptagon (ˈhɛptəɡən)
 
n
a polygon having seven sides
 
heptagonal
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Etymonline
Word Origin & History

heptagon
1570, from Gk. heptagonon, from hepta "seven" (cognate with L. septem, Goth. sibun, O.E. seofon; see seven) + gonia "angle" (see knee).
Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
American Heritage
Science Dictionary
heptagon   (hěp'tə-gŏn')  Pronunciation Key 
A polygon having seven sides.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Example sentences
The diagonals of heptagon, nonagon, and decagon should be drawn directly onto the worksheet.
Related Words
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature