菱面型; 菱形; 菱形六面體
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.
adj : having three-fold symmetry [syn: trigonal]