krəuˈmætɪk adj. 1 of or produced by
colour; in (esp. bright) colours. 2 Mus. a of or having notes
not belonging to a
diatonic scale. b (of a scale) ascending or descending by semitones. øchromatic
aberration Optics the failure of
different wavelengths of
electromagnetic radiation to
come to the
same focus after refraction. chromatic
semitone Mus. an
interval between a
note and its flat or
sharp. øøchromatically adv. chromaticism n. [F chromatique or L chromaticus f. Gk khromatikos f. khroma -atos colour]