1. a 12-note scale including all the semitones of the octave;
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
1. Relating to color, or to colors.
2. (Mus.) Proceeding by the smaller intervals (half steps or
semitones) of the scale, instead of the regular intervals
of the diatonic scale.
Note: The intermediate tones were formerly written and
printed in colors.
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
WordNet (r) 3.0 (2006):
n 1: a 12-note scale including all the semitones of the octave