* Chromatic: Relating to color, especially in music.
* Chromaticity: The quality of a color, especially its hue, saturation, and lightness.
* Chromatography: A method of separating mixtures of substances by their different affinities for a stationary phase and a mobile phase.
* Chromosome: A thread-like structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes.
* Chromium: A hard, silvery-grey, lustrous, brittle metallic element.
* Chromophore: A part of a molecule that absorbs light and gives it its color.
* Chromoplast: A plastid that contains pigments other than chlorophyll, such as carotenoids.
* Chromatic aberration: A type of optical distortion in which different colors of light are focused at different points.
* Chromoscope: An instrument for measuring the color of an object.
* Chromotropism: The growth response of a plant in response to a light stimulus.
Let me know if you'd like more examples or want to know more about any of these words!