A rhombus. / A rhombohedron.

plural of rhomb

A rhombus or oblique parallelopiped of glass cut so that a ray of light entering one of its faces at right angles shall emerge at right angles at the opposite face, after undergoing within the rhombus, at other faces, two reflections. It is used to produce a ray circularly polarized from a plane-polarized ray, or the reverse.

Synonym of Fresnel's rhomb

plural of Fresnel's rhomb

plural of Fresnel rhomb

(geometry) A parallelogram having all sides of equal length. / The rhombus diamond, as one of the suits seen in a deck of playing cards ( or ).

plural of rhombus

A prism with six faces, each a rhombus.

(neuroanatomy) The hindbrain