Pronunciation: (hek-sag'u-nl), [key]
1. of, pertaining to, or having the form of a hexagon.
2. having a hexagon as a base or cross section: a hexagonal prism.
3. divided into hexagons, as a surface.
4. Crystall.noting or pertaining to a system of crystallization in which three equal axes intersect at angles of 60° on one plane, and the fourth axis, of a different length, intersects them perpendicularly.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.