(redirected from rhombohedra)
Also found in: Thesaurus, Encyclopedia.
Related to rhombohedra: rhombohedron, Rhombohedral system
click for a larger image


n. pl. rhom·bo·he·drons or rhom·bo·he·dra (-drə)
A prism with six faces, each a rhombus.


n, pl -drons or -dra (-drə)
(Mathematics) a six-sided prism whose sides are parallelograms
[C19: from rhombus + -hedron]


(ˌrɒm bəˈhi drən)

n., pl. -drons, -dra (-drə).
a solid bounded by six rhombic planes.
[1830–40; < Greek rhómbo(s) rhombus + -hedron]
rhom`bo•he′dral, adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.rhombohedron - a parallelepiped bounded by six similar faces (either rhombuses or parallelograms)rhombohedron - a parallelepiped bounded by six similar faces (either rhombuses or parallelograms)
parallelepiped, parallelepipedon, parallelopiped, parallelopipedon - a prism whose bases are parallelograms
hexahedron - any polyhedron having six plane faces
References in periodicals archive ?
These authors demonstrated experimentally that radially arranged CaC03 fibers that exhibited non-crystallographic symmetry were built from a set of cleaved calcite rhombohedra that were arranged along their c-axis and behaved as a single crystal.
These quartz crystals rest, in no apparent preferred orientation, upon the calcite rhombohedra (Fig.
First the Nl points in the isopachous layer are decorated with equilateral rhombohedra ([alpha] = -15).
3], calcite rhombohedra and "manganolimonite" streaks.
The family of proteins from the prismatic layer induced a habit modification in calcite growth, yielding globular growth instead of the rhombohedra obtained in the absence of proteins.
It commonly occurs in cubic rhombohedra and is rarely massive.
The Randville dolomite and the Vulcan Iron Formation contain vugs of calcite scalenohedra, dolomite rhombohedra, pyrite cubes, and marcasite blades.
The dissolution/ crystallisation advances following the sparitic cement, while the oncoids are preserved as relicts resisting the growth of the rhombohedra due to low porosity and the presence of dense micritic laminae in concentric coats acting as a barrier.
Chabazite-Ca occurs as simple, water-clear penetration twins of pseudocubic rhombohedra and as yellow, complexly twinned, lens-shaped crystals.
Steinhardt extended one Penrose tiling scheme to three dimensions, coming up with two shapes, both looking like squashed cubes or rhombohedra.
A very common mineral in the lower sill, ankerite occurs as aggregates of transparent to translucent, predominantly yellow and less commonly beige, greenish yellow, and pale brownish yellow rhombohedra, 1-2 mm in diameter, with a vitreous luster.