Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Having seven angles and sides.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Having seven angles or sides.

from The Century Dictionary and Cyclopedia

  • Having seven angles or sides.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

Since 16th century, from heptagon +‎ -al, from Ancient Greek έπτάγωνος (heptagonos).

Examples

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