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