Dictionary of Human Evolution and Biology

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1. any hybrid structure not commonly found in nature. In chemistry, chimeras are often used as tools to elucidate protein structure and function.

2. an entire organism consisting of amalgamates of cells from more than one zygote; Cf. mosaic.

See chimeric twins and freemartin effect.

3. sometimes used to describe the mistaken attribution of specimens from more than one individual, or even species, to the same individual fossil, as in the case of Piltdown.

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