WordWeb Online

1. Of or relating to monochromatism
    
2. (of light or other electromagnetic radiation) having only one wavelength
   "monochromatic light";
   - homochromatic
    
3. Having or appearing to have only one colour
   - monochrome, monochromic, monochromous

See also: colored [US], colorful [US], coloured [Brit, Cdn], colourful [Brit, Cdn]

Antonym: polychromatic

Encyclopedia: Monochromatic