The Collaborative International Dictionary of English v.0.48:

Chromatic \Chro*mat"ic\, a. [L. chromaticus, Gr. ?, suited for
   color, fr. ?, ?, color; akin to ? color, ? skin, color of the
   skin.]
   1. Relating to color, or to colors.
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   2. (Mus.) Proceeding by the smaller intervals (half steps or
      semitones) of the scale, instead of the regular intervals
      of the diatonic scale.
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   Note: The intermediate tones were formerly written and
         printed in colors.
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   Chromatic aberration. (Opt.) See Aberration, 4.

   Chromatic printing, printing from type or blocks covered
      with inks of various colors.

   Chromatic scale (Mus.), the scale consisting of thirteen
      tones, including the eight scale tones and the five
      intermediate tones.
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