heptagon

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Related to heptagonal: Heptagonal numbers

heptagon

a polygon having seven sides

Heptagon

A seven-sided regular polygon; the angle included between the seven sides is 128.6 degrees.

heptagon

[′hep·tə‚gän]
(mathematics)
A seven-sided polygon.
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References in periodicals archive ?
The building's unique heptagonal structure contributes dynamic angles and multiple exposures, offering exceptional light and views.
The compact old part of town was built in the late Medieval era with two city gateways, a councilhouse with one of the oldest indoor-theatres of central Switzerland, and three heptagonal fountains with bronze figures of more recent date.
At least three anal plates in cup; radianal very small, quadrangular (rectangular to trapezoidal), below and to right of anal X; anal X heptagonal, higher than wide, somewhat smaller than radials, with stellate ridges to adjacent plates; one large sac plate immediately above anal X that is partially in aboral cup (Fig.