octahedral \oc`ta*he"dral\ ([o^]k`t[.a]*h[=e]"dral), a. [See
{octahedron}.]
Having eight faces or sides; of, pertaining to, or formed in,
octahedrons; as, octahedral cleavage; an octahedral crystal.
[1913 Webster]
{octahedral borax} (Chem.), borax obtained from a saturated
solution in octahedral crystals, which contain five
molecules of water of crystallization; distinguished from
common or {prismatic borax}.
{Octahedral iron ore} (Min.), magnetite.
[1913 Webster]