About The Word Prism

Bay Area Crosswords

Learn about the word Prism to help solve your crossword puzzle. Discover Prism definitions and meaning, origins, synonyms, related terms and more at the free Crossword Dictionary.

Prism

Prism Meaning & Definition
Prism Definition And Meaning

What's The Definition Of Prism?

[n] optical device having a triangular shape and made of glass or quartz; used to deviate a beam or invert an image
[n] a polyhedron with two congruent and parallel faces (the bases) and whose lateral faces are parallelograms

Synonyms | Synonyms for Prism: optical prism

Related Terms | Find terms related to Prism:

See Also | biprism | erecting prism | optical device | parallelepiped | parallelepipedon | parallelopiped | parallelopipedon | polyhedron | prism spectroscope | quadrangular prism | scope | spectroscope | telescope | triangular prism

Prism In Webster's Dictionary

\Prism\ (pr[i^]z'm), n. [L. prisma, Gr. pri`sma, fr. pri`zein, pri`ein, to saw: cf. F. prisme.] 1. (Geom.) A solid whose bases or ends are any similar, equal, and parallel plane figures, and whose sides are parallelograms. Note: Prisms of different forms are often named from the figure of their bases; as, a triangular prism, a quadrangular prism, a rhombic prism, etc. 2. (Opt.) A transparent body, with usually three rectangular plane faces or sides, and two equal and parallel triangular ends or bases; -- used in experiments on refraction, dispersion, etc. 3. (Crystallog.) A form the planes of which are parallel to the vertical axis. See {Form}, n., 13. {Achromatic prism} (Opt.), a prism composed usually of two prisms of different transparent substances which have unequal dispersive powers, as two different kinds of glass, especially flint glass and crown glass, the difference of dispersive power being compensated by giving them different refracting angles, so that, when placed together so as to have opposite relative positions, a ray of light passed through them is refracted or bent into a new position, but is free from color. {Nicol's prism}, {Nicol prism}. [So called from Wm. Nicol, of Edinburgh, who first proposed it.] (Opt.) An instrument for experiments in polarization, consisting of a rhomb of Iceland spar, which has been bisected obliquely at a certain angle, and the two parts again joined with transparent cement, so that the ordinary image produced by double refraction is thrown out of the field by total reflection from the internal cemented surface, and the extraordinary, or polarized, image alone is transmitted.

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