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
