PRISMS ARE:

1. A solid figure whose bases or ends have the same size and shape and are parallel to one another, and each of whose sides is a parallelogram.
2. A transparent body of this form, often of glass and usually with triangular ends, used for separating white light passed through it into a spectrum or for reflecting beams of light.
3. A cut-glass object, such as a pendant of a chandelier.
4. A crystal form consisting of three or more similar faces parallel to a single axis.
5. A medium that misrepresents whatever is seen through it.

noun

1. a transparent block, often with triangular ends and rectangular sides, used to disperse light into a spectrum or refract it in optical instruments

2. Maths a polyhedron with parallel bases and sides that are parallelograms [Greek prisma something shaped by sawing]

PRISM'S DO A LOT. GO OBJECT GO.