prism


prism
A transparent solid, with sides that converge at an angle, that deflects a ray of light toward the thickest portion (the base) and splits white light into its component colors; in spectacles, a p. corrects ocular muscle imbalance. [G. prisma]
- enamel prisms SYN: prismata adamantina, under prisma.
- Fresnel p. a p. composed of concentric annular rings.
- Nicol p. a p. that transmits only polarized light.
- Risley rotary p. a p. with a circular base that is rotated in a metal frame marked with a scale; used in examination of ocular muscle imbalance.
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pediatric risk of mortality; Platelet Receptor Inhibition in Ischemic Syndrome Management [study]

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prism 'priz-əm n
1) a polyhedron with two polygonal faces lying in parallel planes and with the other faces parallelograms
2) a transparent body that is bounded in part by two nonparallel plane faces and is used to refract or disperse a beam of light
3) a crystal form whose faces are parallel to one axis esp one whose faces are parallel to the vertical axis

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(prizґəm) [Gr. prisma] a solid of glass, plastic, or a similar substance with a triangular or polygonal cross section, which splits up a ray of light into its constituent colors and turns or deflects light rays toward its base. Prisms are used to correct deviations of the eyes, since they alter the apparent situation of objects. Abbreviated Pr.

Medical dictionary. 2011.

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  • Prism — may refer to:cience and mathematics* Prism (optics), a transparent object which refracts light ** Dispersive prism, the most familiar type of optical prism * Prism (geometry), a kind of polyhedron * Prism (geology), a kind of sedimentary… …   Wikipedia

  • PRISM — Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom. PRISM peut faire référence à : PRISM, un concours d accès à l ISEG, une grande école de commerce, PRISM, une planète fictive introduite par Alan Dean …   Wikipédia en Français

  • 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. [1913 Webster] Note: Prisms of… …   The Collaborative International Dictionary of English

  • Prism — steht für: Delphi Prism, Delphi Programmierumgebung für das .NET Framework, siehe Embarcadero Delphi#Delphi Prism (Delphi .NET) Mozilla Prism, freie Softwareumgebung, um Webanwendungen in eine Desktopumgebung zu integrieren Prism (Rockband) oder… …   Deutsch Wikipedia

  • PRISM — может означать: PRISM (микросхема), микросхема, выпущенная компанией Conexant, обеспечивающая беспроводную связь DEC PRISM, английская аббревиатура от «Параллельный вычислитель с ограниченным набором команд» компании Digital Equipment Corporation …   Википедия

  • Prism 3D — Le Prism 3D est un cerf volant adapté au vol en intérieur ou en extérieur par vent nul à léger. Sa voilure est de type delta, et il se pilote au moyen de deux lignes …   Wikipédia en Français

  • prism — [ prızəm ] noun count any solid object that has a regular shape with flat sides and straight edges, especially an object with some sides shaped like a TRIANGLE a. a glass object in the shape of a prism, used for dividing light into its different… …   Usage of the words and phrases in modern English

  • prism — 1560s, a type of solid figure, from L.L. prisma (Martianus Capella), from Gk. prisma (Euclid), lit. something sawed, from prizein to saw. Meaning in optics is first attested 1610s …   Etymology dictionary

  • prism — ► NOUN 1) a piece of glass or other transparent material of regular shape, used to separate white light into a spectrum of colours. 2) Geometry a solid geometric figure whose two ends are similar, equal, and parallel rectilinear figures, and… …   English terms dictionary

  • prism — [priz′əm] n. [LL prisma < Gr, lit., something sawed < prizein, to saw < priein, to saw, bite; ? akin to Alb prish, (I) destroy, break] 1. Geom. a solid figure whose ends are parallel, polygonal, and equal in size and shape, and whose… …   English World dictionary

  • Prism — Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom. PRISM peut faire référence à : PRISM, un concours d accès à l ISEG, une grande école de commerce, PRISM, une planète fictive introduite par Alan Dean …   Wikipédia en Français