Prism

prizm, n. ( geom. ) a solid whose ends are similar, equal, and parallel planes, and whose sides are parallelograms: ( opt. ) a solid gla , triangular-shaped body, used for resolving rays of light into their separate colours.— adjs. Prismat′ic , -al , resembling or pertaining to a prism: separated or formed by a prism.— adv. Prismat′ically .— ns. Pris′matoid , Pris′moid , a figure in the form of a prism.— adjs . Pris′matoidal , Pris′moidal ; Pris′my , prismatic in colour. [L.,—Gr. prism a , -atos .]