hex·ag·o·nal 
(hĕk-săgə-nəl)
(hĕk-săgə-nəl)adj.
1. Having six sides.
2. Containing a hexagon or shaped like one.
3. Mineralogy Having three equal axes intersecting at angles of 60° in one plane and one axis of variable length that is perpendicular to the others.
hex·ago·nal·ly adv.