| HETEROCHROMATIC | • heterochromatic adj. Having more than one colour; relating to heterochromia. • heterochromatic adj. Of light, having more than one wavelength. • heterochromatic adj. Of or relating to heterochromatin. |
| HETEROCHROMATIN | • heterochromatin n. (Cytology) Heterochromatic tightly coiled chromosome material; believed to be genetically inactive. • HETEROCHROMATIN n. densely staining chromatin that appears as nodules in or along chromosomes and contains relatively few genes. |
| HETEROCHROMOUS | • heterochromous adj. (Botany) Having the central florets of a flower head of a different colour from those of the circumference. • HETEROCHROMOUS adj. having different colors. |
| HETEROCHRONIC | • heterochronic adj. (Biology) Occurring at different times or intermittently. • HETEROCHRONIC adj. showing divergence from the normal time sequence in development. |
| HETEROCHRONIES | • heterochronies n. Plural of heterochrony. • HETEROCHRONY n. divergence from normal time sequence in development, also HETEROCHRONISM. |
| HETEROCHRONISM | • heterochronism n. (Biology) heterochrony. • HETEROCHRONISM n. divergence from the normal time sequence in development, also HETEROCHRONY. |
| HETEROCHRONISMS | • heterochronisms n. Plural of heterochronism. • HETEROCHRONISM n. divergence from the normal time sequence in development, also HETEROCHRONY. |
| HETEROCHRONOUS | • heterochronous adj. (Paleontology) formed at different periods. • HETEROCHRONOUS adj. divergent from the normal time sequence. |
| HETEROCHRONY | • heterochrony n. (Biology) the variation in ontogeny of individuals of a species that gives rise to evolution. • HETEROCHRONY n. divergence from normal time sequence in development, also HETEROCHRONISM. |
| XEROCHASIES | • XEROCHASY n. dehiscence on drying. |
| XEROCHASY | • xerochasy n. (Biology) dehiscence that occurs upon drying. • XEROCHASY n. dehiscence on drying. |