(proscribed) A polygon with seven sides and seven angles.
(geometry) A polygon with seven sides and seven angles.
A plane figure consisting of seven sides and having seven angles.
a seven-sided polygon
a plane figure with seven straight sides and angles.
In geometry, a heptagon is a seven-sided polygon or 7-gon. The heptagon is sometimes referred to as the septagon, using (an elision of septua-, a Latin-derived numerical prefix, rather than hepta-, a Greek-derived numerical prefix; both are cognate) together with the Greek suffix meaning angle.