1. rhombohedral - Adjective
2. rhombohedral - Adjective Satellite
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.
Source: Webster's dictionaryAcute scalenohedral crystals are sometimes referred to as "dogtooth spar" while the rhombohedral form is sometimes referred to as "nailhead spar". Source: Internet
Carbonates tend to be brittle, many have rhombohedral cleavage, and all react with acid. Source: Internet
At ambient conditions, samarium normally assumes a rhombohedral structure (α form). Source: Internet
In monoclinic, rhombohedral, tetragonal, and trigonal/hexagonal systems there is one unique axis (sometimes called the principal axis) which has higher rotational symmetry than the other two axes. Source: Internet
Polonium has two allotropes, which are known as α-polonium and β-polonium. citation α-polonium has a cubic crystal structure and converts the rhombohedral β-polonium at 36 °C. Source: Internet
Reddish rhombohedral calcite crystals from China. Source: Internet