Having or exhibiting a variety of colors.
… the degreening of leaves is a widely appreciated natural phenomenon, especially in autumn, when the foliage of deciduous trees turns into polychromatic beauty.
Throughout, Suzy Lee’s polychromatic illustrations astonish. Each page bursts with color.
English polychromatic is a borrowing from French polychromatique, which comes from Greek polychrṓmatos “many-colored, variegated” and the suffix -ique, from the Greek suffix -ikos or the Latin suffix -icus. Polychromatic is used mostly, but not exclusively, in the physical sciences, e.g., hematology, physics, and formerly in chemistry. Polychromatic entered English in the 19th century.
Source: https://www.dictionary.com/wordoftheday/2018/09/22/polychromatic/?param=wotd-email&click=ca77rh&utm_source=Sailthru&utm_medium=email&utm_campaign=Live WOTD Recurring 2018-09-22&utm_term=wordoftheday