mon·o·chro·mat·ic / ˌmänəkrōˈmatik/ • adj. containing or using only one color: monochromatic light. ∎  Physics (of light or other radiation) of a single wavelength or frequency. ∎  lacking in variety; monotonous: her typically monochromatic acting style.DERIVATIVES: mon·o·chro·mat·i·cal·ly / -ik(ə)lē/ adv.

monochromatic (mon-oh-krŏ-mat-ik) adj. denoting radiation, especially light, of the same frequency or wavelength.