Prismatic; Prismatical

Part of speech: adjective (a.)

1. Resembling, or pertaining to, a prism; as, a prismatic form or cleavage.

2. Separated or distributed by a prism; formed by a prism; as, prismatic colors.

3. Same as Orthorhombic. Prismatic borax (Chem.), borax crystallized in the form of oblique prisms, with ten molecules of water; -- distinguished from octahedral borax. -- Prismatic colors (Opt.), the seven colors into which light is resolved when passed through a prism; primary colors. See Primary colors, under Color. -- Prismatic compass (Surv.), a compass having a prism for viewing a distant object and the compass card at the same time. -- Prismatic spectrum (Opt.), the spectrum produced by the passage of light through a prism.