Rhombohedral system
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]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • rhombohedral system — noun : a crystal system characterized by three equal and interchangeable axes at equal angles to each other and usually classed as a division of the hexagonal system compare tetragonal system …   Useful english dictionary

  • 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]… …   The Collaborative International Dictionary of English

  • Rhombohedral iron ore — 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… …   The Collaborative International Dictionary of English

  • Rhombohedral crystal system — In crystallography, the rhombohedral (or trigonal) crystal system is one of the seven lattice point groups, named after the two dimensional rhombus. A crystal system is described by three basis vectors. In the rhombohedral system, the crystal is… …   Wikipedia

  • rhombohedral — [räm΄bə hē′drəl] adj. 1. of or having to do with a rhombohedron 2. designating or of a crystal system having three axes of equal length, none of which intersects at right angles with another: see CRYSTAL SYSTEM * * * See rhombohedron. * * * …   Universalium

  • rhombohedral — [räm΄bə hē′drəl] adj. 1. of or having to do with a rhombohedron 2. designating or of a crystal system having three axes of equal length, none of which intersects at right angles with another: see CRYSTAL SYSTEM …   English World dictionary

  • system — [sis′təm] n. [LL systema < Gr systēma (gen. systēmatos) < synistanai, to place together < syn , together + histanai, to set: see STAND] 1. a set or arrangement of things so related or connected as to form a unity or organic whole [a… …   English World dictionary

  • Rhombohedral emerald malachite — Dioptase Dioptase Catégorie IX : silicates Dioptase du Kazakhstan …   Wikipédia en Français

  • crystal system — noun : any of the six or sometimes seven main groups into which crystals are commonly classified according to the relative lengths and inclinations of their axes or according to their respective symmetries see hexagonal system, isometric system,… …   Useful english dictionary

  • trigonal system — ▪ crystallography also called  Rhombohedral System,        one of the structural categories to which crystalline solids can be assigned. The trigonal system is sometimes considered to be a subdivision of the hexagonal system.       Components of… …   Universalium

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