hexagonal

Cystin crystals are colorless, highly refractive, rather thick, hexagonal plates with well-defined edges.

Common camphor forms a translucent mass of hexagonal prisms, melting at 175 and boiling at 204.

A rule very commonly used in making drawings of hexagonal nuts is to make the diameter D, across the angles equal to 2d.

The upper part of the stud is screwed, and carries the guard D and an hexagonal nut E. F is the india-rubber.

In shape it is hexagonal, with shafts at the angles rising into an enriched cornice.