[hep-tuh-gon, -guh n]

Origin of heptagon

First recorded in 1560–70, heptagon is from the Greek word heptágōnos seven-cornered. See hepta-, -gon
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for heptagon

Historical Examples of heptagon

British Dictionary definitions for heptagon


  1. a polygon having seven sides
Derived Formsheptagonal (hɛpˈtæɡənəl), adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for heptagon

1560s, from Middle French heptagon, from Greek heptagonon, from hepta "seven" (cognate with Latin septem, Gothic sibun, Old English seofon; see seven) + gonia "angle" (see knee (n.)). Related: Heptagonal.

Online Etymology Dictionary, © 2010 Douglas Harper

heptagon in Science


  1. A polygon having seven sides.
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