Definitions

from The Century Dictionary.

  • Having seven angles or sides.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective Having seven angles or sides.
  • adjective (Arith.) the numbers of the series 1, 7, 18, 34, 55, etc., being figurate numbers formed by adding successively the terms of the arithmetical series 1, 6, 11, 16, 21, etc.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective Having seven angles and sides.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

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

Support

Help support Wordnik (and make this page ad-free) by adopting the word heptagonal.

Examples

Comments

Log in or sign up to get involved in the conversation. It's quick and easy.