rhombohedron

[ rom-buh-hee-druhn ]

noun

, plural rhom·bo·he·drons, rhom·bo·he·dra [rom-b, uh, -, hee, -dr, uh].

1. a solid bounded by six rhombic planes.

rhombohedron

/ ˌrɒmbəʊˈhiːdrən /

noun

1. a six-sided prism whose sides are parallelograms

rhombohedron

/ rŏm′bō-hē′drən /

, Plural rhombohedrons

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

Other Words From

• rhombo·hedral adjective

Word History and Origins

Origin of rhombohedron¹

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

Word History and Origins

Origin of rhombohedron¹

C19: from rhombus + -hedron

Example Sentences

Calcite cleaves in three directions parallel to the faces of the primitive rhombohedron.

From Project Gutenberg

Chalybite crystallizes in the rhombohedral system and is isomorphous with calcite; like this it possesses perfect cleavages parallel to the faces of the primitive rhombohedron, the angles between which are 73� 0′.

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