• (a.) Having the central florets of a flower head of a different color from those of the circumference.
Het`er·o·chro'mous adjective [ Hetero- + Greek ... color.] (Botany) Having the central florets of a flower head of a different color from those of the circumference. 
Type: Term Pronunciation: het′ĕr-ō-krō′mŭs Definitions: 1. Having an abnormal difference in coloration.
heterochromia, heterochromic, heterochronism, heterochrome, heterochromous 1. In medicine, a difference in color between two organs (especially the eyes), or between different parts of the same organ, that are usually the same color. 2. Having an abnormal difference in coloration.