D defs.my
Entry 1 sense Webster, 1913

Monochromatic

/mänˌ-ək-rōm-ăt'-ĭk/ · Mon·o·chro·mat·ic · IPA /mˌɑnəkroʊmˈætɪk/
01 a. Consisting of one color, or presenting rays of light of one color only.
  1. 1.
    Consisting of one color, or presenting rays of light of one color only.
Phrases & compounds
Monochromatic lamp — a lamp whose flame yields rays of some one homogenous light. It is of great importance in optical experiments.