01 a. Related to the rhombohedron; presenting the form of a rhombohedron, or a form derivable from a rhombohedron; relating to a system of forms …
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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.