Octagon
WordNet
noun
(1) An eight-sided polygon
WiktionaryText
Etymology
First attested in 1656, from octagonos, from οκτάγωνος (oktágōnos), eight-angled, from ὀκτώ (okto), eight + γωνία (gonia), angle.
Noun
- A polygon with eight sides and eight angles.
- The arena for mixed martial arts, particularly as trademarked by the UFC.