prism
UK /ˈpɹɪz(ə)m/ · US /ˈpɹɪzəm/ noun
Forms prisms
- noun An object having the shape of a geometrical prism (sense 1).
- noun (construction) A cutting (“open passage at a level lower than the surrounding terrain, dug for a canal, railway, or road to go through”) or an embankment shaped like a prism (sense 1) or a number of prisms, such that its volume can be easily calculated.
- noun (crystallography) A crystal in which the faces are parallel to the vertical axis.
- noun (optics) A transparent block in the shape of a prism (sense 1), typically with triangular ends, used to reflect or refract light.
- noun (archaic) A spectrum produced by light being refracted through a prism.
- noun (by extension, surveying) A retroreflector (“device which reflects light back to its source with minimal scattering”) which is usually attached to a surveying pole as a target for a total station which emits a light beam at the device and calculates how long it takes to be reflected back in order to measure distance.
- noun (figurative) A perspective that colours one's perception.
Synonyms
Etymology
Learned borrowing from Late Latin prisma (“(geometry) prism”), from Ancient Greek πρίσμᾰ (prísmă, “anything sawn; sawdust; (Koine, geometry) prism”), from πρῐ́ζω (prĭ́zō) (a variant of πρῑ́ω (prī́ō, “to saw”), further etymology unknown) + -μᾰ (-mă, suffix forming neuter nouns denoting the effect or result of an action, etc.).
Webster’s 1913
- noun A solid whose bases or ends are any similar, equal, and parallel plane figures, and whose sides are parallelograms.
- noun 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.
Etymology [L. prisma, Gr. prisme.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “prism”, CC BY-SA 4.0. Details