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Definition of heptagon

heptagon

/ˈhɛp.tə.ɡɒn/
hep · ta · gon
Plural:heptagons
•
Adjective:heptagonal
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heptagon Lexical Profile

heptagon Game Scores & Validity

• noun

1

A plane geometric figure or polygon that has seven sides and seven angles.

Example

"The British fifty-pence coin is shaped like an equilateral curve heptagon so that it can roll smoothly inside vending machines."

Synonyms
View all synonyms for heptagon

Word Nuance & Usage

While 'heptagon' (from Greek) is the standard term used in geometry, 'septagon' (a hybrid of the Latin root for seven and the Greek suffix for angle) is occasionally seen in informal usage.

• Nearby Words

hentai
hepatica
hepatitis
heptagon
heptathlete
heptathlon
her

Word Origin & Etymology

Borrowed in the mid-16th century via Late Latin heptagonum from Ancient Greek heptágōnon, combining heptá ('seven') and gōnía ('angle, corner').

Cite this Entry

Wordmom. (2026). Definition of Heptagon. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/heptagon
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