'Rhombohedral' definitions:

Definition of 'rhombohedral'

(from WordNet)
adjective
Having threefold symmetry [syn: rhombohedral, trigonal]

Definition of 'Rhombohedral'

From: GCIDE
  • 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. [1913 Webster]
  • Rhombohedral iron ore (Min.) See Hematite.
  • Rhombohedral system (Crystallog.), a division of the hexagonal system embracing the rhombohedron, scalenohedron, etc. [1913 Webster]