Rhombohedral /(?)/

Rhom·bo·he·dral

Rhombohedral

a.
  1. 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. (Geom. & Crystallog.)

Phrases & Compounds

Rhombohedral iron ore
See Hematite.
Rhombohedral system
a division of the hexagonal system embracing the rhombohedron, scalenohedron, etc.