rhombohedron

rhom·bo·he·dron

(rŏm′bō-hē′drən)

n. pl. rhom·bo·he·drons or rhom·bo·he·dra (-drə)

A prism with six faces, each a rhombus.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

rhombohedron

(ˌrɒmbəʊˈhiːdrən)

n, pl -drons or -dra (-drə)

(Mathematics) a six-sided prism whose sides are parallelograms

[C19: from rhombus + -hedron]

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

rhom•bo•he•dron

(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:

Noun

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

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References in periodicals archive

It mostly occurs as massive subhedral calcite with some rhombohedron faces (Figs 6D, E, 7G).

Carbonate cementation in the late glacial outwash and beach deposits in northern Estonia/Sekundaarne karbonaatne tsementatsioon hilisglatsiaalsetes glatsifluviaalsetes ja rannikusetetes Pohja-Eestis

The backing block is a brass rhombohedron. Three orthographic schematic views are shown in Fig.

Long-term stability of the NIST Conical Reference Transducer

Some crystals taper at one end and are terminated by steep rhombohedron faces on the other.

The Clay Canyon variscite mine: Fairfield, Utah has been famous among mineral collectors for well over a century as the source of the world's finest specimens of variscite

Each rhombohedron [G.sub.i] (before rotation) centered at [x.sub.i] is the intersection of three pairs of parallel planes as defined in Eq.

Modeling of multiscale porous media

The calcite chips were obtained by gently striking a large calcite rhombohedron ([tilde]4 cm in length; Watkins Mineral Corp., Wichita Falls, Texas) with a razor edge, producing small rhombohedral fragments.

Nucleation and Growth of Calcite on Native Versus Pyrolyzed Oyster Shell Folia

X-ray crystallography showed, however, that the basic unit of solid cubane is again a rhombohedron. The findings appear in the June 30 PHYSICAL REVIEW LETTERS.

Structure puts cubane in a slanted box

Carefully detailed crystallographic study reveals that in every case what appears to be a "single" crystal, resembling a distorted rhombohedron, is actually an oriented intergrowth of several parallel twins having a common composition plane.

Calcite and zeolites from Sambava, Madagascar

Calcite crystals occur in a wide variety of habits, the scalenohedron and rhombohedron being the most common forms.

The Fanwood quarry: Somerset County New Jersey

The stout amethyst crystals (terminal rhombohedron faces dominating) are medium-lustrous and color-zoned, with the best, gemmiest purple tones near their tips.

Denver Show 2009

Crystal habits range from elongated hexagonal prisms with low-angle rhombohedron terminations to prism and scalenohedron combinations in varying proportions.

The West Cumbrian Iron Orefield

It occurs in a wide variety of habits, but the scalenohedron and rhombohedron are the most common forms.

The Braen quarry: Haledon, Passaic County, New Jersey

According to Kostov (1968) and Moroshkin and Frishman (2001), the temperature of crystallization of various calcite forms proceeds from the {10[bar.1]1} rhombohedron at high temperature to the {[bar.1][bar.1]20} prism, {21[bar.3]1} scalenohedron, and lastly the {02[bar.1]1} steep rhombohedron at low temperature.

"Skunk" calcite: mineral paragenesis in an amethyst geode from Ametista, Rio Grande do Sul, Brazil