Prisma.
n.A solid whose bases or ends are any similar, equal, and parallel plane figures, and whose sides are parallelograms.
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.
A form the planes of which are parallel to the vertical axis. See Form, n., 13
polyhedron generic term noun, optical prism, optical device generic term
Vogais: i
Consoantes: prsm
porism, prismy, purism, persism, parsiism, perisoma, perisome, priggism, prosaism, prison.