Merriam-Webster Collegiate Dictionary - monochromatic

 adjective  Etymology: Latin monochromatos, from Greek monochromatos, from mon- + chromat-, chroma color  Date: 1822  1.  a. having or consisting of one color or hue  b. monochrome 2  2. consisting of radiation of a single wavelength or of a very small range of wavelengths  3. of, relating to, or exhibiting monochromatism  4. lacking variety, creativity, or excitement ; colorless  • ~ally adverb  • ~ity noun