1. In botany, relating to the central little flowers of the flower head of a different colour from those of the circumference: In her garden, Susan admired the heterochromous pink parts of the composite blooms.
2. Pertaining to something in which one part has a color that is distinct from the other parts: In the art class, Mrs. Pink told her students to create a picture which had heterochromous accents of color in each part differing from the other colors.