Webster's Revised Unabridged Dictionary · 1913

Monochromatic

Monochromatic , adjective

[Compare French monochromatique. See Monochrome.]

Consisting of one color, or presenting rays of light of one color only.
Collocations (1)
Monochromatic lamp (Optics) , a lamp whose flame yields rays of some one homogenous light. It is of great importance in optical experiments.