|n.||1.||(Geom.) A solid whose bases or ends are any similar, equal, and parallel plane figures, and whose sides are parallelograms.|
|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.|
|Noun||1.||prism - a polyhedron with two congruent and parallel faces (the bases) and whose lateral faces are parallelograms|
|2.||prism - optical device having a triangular shape and made of glass or quartz; used to deviate a beam or invert an image|
Synonyms: optical prism
|PRISM - A distributed logic language.|
["PRISM: A Parallel Inference System for Problem Solving", S. Kasif et al, Proc 1983 Logic Prog Workshop, pp. 123-152].