| chimera | <cell biology> Organism composed of two genetically distinct types of cells. Can be formed by the fusion of two early blastula stage embryos or by the reconstitution of the bone marrow in an irradiated recipient or by somatic segregation. (05 Jan 1998) |
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| chimeraplast | <molecular biology> A synthetic molecule made up of both RNA and DNA which is used in gene repair. (05 Jan 1998) |
| radiation chimera | An organism whose body contains cell populations of different genotypes as a result of the injection of foreign cells into it after it has received sufficient ionizing radiation to destroy the mature host cells which would otherwise reject the injected cells. (12 Dec 1998) |
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| transplantation chimera | An organism that, as a result of transplantation of donor genetic material, consists of two or more cell lines descended from at least two zygotes. This state results in the induction of donor-specific transplantation tolerance. (12 Dec 1998) |