hep
ta
gon
Plural
heptagons
1
a seven-sided plane shape consisting of seven line segments or edges that meet at seven interior angles
- My young daughter proudly showed me the colorful heptagon she had cut out for her geometry homework assignment.
- X-ray crystallography revealed the molecular framework contained multiple rings incorporating pentagons and intersecting heptagons.
- One version of the game featured a board laid out in a grid of non-uniform heptagons instead of the usual squares.