rhombohedral system 菱方晶系
菱形晶系
Rhombohedral \Rhom`bo*he"dral\, a. (Geom. & Crystallog.)
Related to the rhombohedron; presenting the form of a
rhombohedron, or a form derivable from a rhombohedron;
relating to a system of forms including the rhombohedron and
scalenohedron.
{Rhombohedral iron ore} (Min.) See {Hematite}.
{Rhombohedral system} (Crystallog.), a division of the
hexagonal system embracing the rhombohedron,
scalenohedron, etc.