heptagon

American  

[hep-tuh-gon, -guhn] / ˈhɛp təˌgɒn, -gən /

noun

1. a polygon having seven angles and seven sides.

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heptagon British  

/ ˈhɛptəɡən, hɛpˈtæɡənəl /

noun

1. a polygon having seven sides

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heptagon Scientific  

/ hĕp′tə-gŏn′ /

1. A polygon having seven sides.

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Other Word Forms

• heptagonal adjective

Etymology

Origin of heptagon

First recorded in 1560–70, heptagon is from the Greek word heptágōnos seven-cornered. See hepta-, -gon

Example Sentences

The sculptural forms are sleek and simplified rather than naturalistic, the overall contour an array of stacked geometric shapes — an oval balanced atop a heptagon standing atop a triangle.

From Los Angeles Times

It is arranged in hexagons, heptagons and triangles.

From Nature

It is based on a tiling of the hyperbolic plane by heptagons.

From Scientific American

And it came as a complete surprise to us; its carbon lattice includes heptagons and octagons that form regions of so-called negative curvature — or the familiar saddle shape.

From Nature

Indeed, we go so far as to study the properties of figures that we cannot construct, as when we ask for the size of the angle of a regular heptagon.

From Project Gutenberg