D defs.my
Entry 3 senses Webster, 1913

Prismatic

/prĭz-măt'-ĭk/ · Pris·mat·ic · IPA /pɹɪzˈmætɪk/
01 a. Resembling, or pertaining to, a prism; as, a prismatic form or cleavage.
  1. 1.
    Resembling, or pertaining to, a prism; as, a prismatic form or cleavage.
  2. 2.
    Separated or distributed by a prism; formed by a prism; as, prismatic colors.
  3. 3.
    Same as Orthorhombic.(Crystallog.) See: Orthorhombic
Phrases & compounds
Prismatic borax — borax crystallized in the form of oblique prisms, with ten molecules of water; -- distinguished from octahedral borax.
Prismatic colors — the seven colors into which light is resolved when passed through a prism; primary colors. See Primary colors, under Color.
Prismatic compass — a compass having a prism for viewing a distant object and the compass card at the same time.
Prismatic spectrum — the spectrum produced by the passage of light through a prism.