PRISMATOIDAL
Pris`ma*toid"al, a. Etym: [Gr. -oid: F. prismatoïde.]
Defn: Having a prismlike form. Ure.
PRISM GLASS
Prism glass.
Defn: Glass with one side smooth and the other side formed into sharp-edged ridges so as to reflect the light that passes through, used at windows to throw the light into the interior.
PRISMOID
Pris"moid, n. Etym: [Cf. F. prismtoïde.]
Defn: A body that approaches to the form of a prism.
PRISMOIDAL
Pris*moid"al, a.
Defn: Having the form of a prismoid; as, prismoidal solids.
PRISMY
Pris"my, a.
Defn: Pertaining to a prism. [R.]