rhombohedron

American  

[rom-buh-hee-druhn] / ˌrɒm bəˈhi drən /

noun

plural

rhombohedrons, rhombohedra

1. a solid bounded by six rhombic planes.

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rhombohedron British  

/ ˌrɒmbəʊˈhiːdrən /

noun

1. a six-sided prism whose sides are parallelograms

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rhombohedron Scientific  

/ rŏm′bō-hē′drən /

plural

rhombohedrons

1. A prism with six faces, each a rhombus.

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Other Word Forms

• rhombohedral adjective

Etymology

Origin of rhombohedron

1830–40; < Greek rhómbo ( s ) rhombus + -hedron

Example Sentences

Six kinds of primitive forms were distinguished, namely, the cube, the regular octahedron, the regular tetrahedron, a rhombohedron, an octahedron with a rhombic base, and a double six-sided pyramid.

From Project Gutenberg

Haydenite is the name given to small yellowish crystals, twinned on a rhombohedron plane r, from Jones’s Falls near Baltimore in Maryland.

From Project Gutenberg

The crystals have the form of a hexagonal prism m terminated by a rhombohedron r, the alternate edges between these being sometimes replaced by the faces of a rhombohedron s.

From Project Gutenberg

As in the other rhombohedral carbonates, the crystals possess perfect cleavages parallel to the faces of the rhombohedron.

From Project Gutenberg

The end faces are cut off in such a manner that the angle of 72� which they originally form with the lateral edge of the rhombohedron is reduced to 68�.

From Project Gutenberg