Rhombohedral

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [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]

From WordNet (r) 2.0 [wn]:

  rhombohedral
       adj : having three-fold symmetry [syn: {trigonal}]