[1] : The Collaborative International Dictionary of English v.0.48

prismatic \prismat"ic\, prismatical \prismat"ical\, a. cf.
   f. prismatique.
   1. resembling, or pertaining to, a prism; as, a prismatic
      form or cleavage.
      1913 webster

   2. separated or distributed by a prism; formed by a prism;
      as, prismatic colors.
      1913 webster

   3. crystallog. same as orthorhombic.
      1913 webster

   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.
      1913 webster
see also:
orthorhombic prismatic borax prismatic colors primary colors color prismatic compass 
prismatic spectrum 

[2] : The Collaborative International Dictionary of English v.0.48

spectrum \spec"trum\, n.; pl. spectra. l. see specter.
   1. an apparition; a specter. obs.
      1913 webster

   2. opt.
      a the several colored and other rays of which light is
          composed, separated by the refraction of a prism or
          other means, and observed or studied either as spread
          out on a screen, by direct vision, by photography, or
          otherwise. see illust. of light, and spectroscope.
      b a luminous appearance, or an image seen after the eye
          has been exposed to an intense light or a strongly
          illuminated object. when the object is colored, the
          image appears of the complementary color, as a green
          image seen after viewing a red wafer lying on white
          paper. called also ocular spectrum.
          1913 webster

   absorption spectrum, the spectrum of light which has passed
      through a medium capable of absorbing a portion of the
      rays. it is characterized by dark spaces, bands, or lines.
      

   chemical spectrum, a spectrum of rays considered solely
      with reference to their chemical effects, as in
      photography. these, in the usual photogrophic methods,
      have their maximum influence at and beyond the violet
      rays, but are not limited to this region.

   chromatic spectrum, the visible colored rays of the solar
      spectrum, exhibiting the seven principal colors in their
      order, and covering the central and larger portion of the
      space of the whole spectrum.

   continous spectrum, a spectrum not broken by bands or
      lines, but having the colors shaded into each other
      continously, as that from an incandescent solid or liquid,
      or a gas under high pressure.

   diffraction spectrum, a spectrum produced by diffraction,
      as by a grating.

   gaseous spectrum, the spectrum of an incandesoent gas or
      vapor, under moderate, or especially under very low,
      pressure. it is characterized by bright bands or lines.

   normal spectrum, a representation of a spectrum arranged
      upon conventional plan adopted as standard, especially a
      spectrum in which the colors are spaced proportionally to
      their wave lengths, as when formed by a diffraction
      grating.

   ocular spectrum. see spectrum, 2
      b, above.

   prismatic spectrum, a spectrum produced by means of a
      prism.

   solar spectrum, the spectrum of solar light, especially as
      thrown upon a screen in a darkened room. it is
      characterized by numerous dark lines called fraunhofer
      lines.

   spectrum analysis, chemical analysis effected by comparison
      of the different relative positions and qualities of the
      fixed lines of spectra produced by flames in which
      different substances are burned or evaporated, each
      substance having its own characteristic system of lines.
      

   thermal spectrum, a spectrum of rays considered solely with
      reference to their heating effect, especially of those
      rays which produce no luminous phenomena.
      1913 webster
see also:
spectra specter light spectroscope ocular spectrum absorption spectrum 
chemical spectrum chromatic spectrum continous spectrum diffraction spectrum gaseous spectrum 
normal spectrum ocular spectrum spectrum prismatic spectrum solar spectrum 
spectrum analysis thermal spectrum 

Spectrum >> S Words
Spectrum, definition of term: Spectrum
spectrum_pag1.html

Prismatic >> P Words
Prismatic, definition of term: Prismatic
prismatic_pag1.html

Color Spectrum >> C Words
Color Spectrum, definition of term: Color Spectrum
color+spectrum_pag1.html

Radio Spectrum >> R Words
Radio Spectrum, definition of term: Radio Spectrum
radio+spectrum_pag1.html