ἀρτιογώνιος
ἀρτιογώνιος, having an even number of angles
ἀρτῐο-γώνιος (or ἀρτῐό-γωνος), ον,
- having an even number of angles, Archim. Sph.Cyl. 1.44, al.
con número par de ángulos
πολύγωνον