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.