1. (rabbitfish) A fish (Chimaera monstrosa) that lives at depths of 100–500 m in the oceans off Western Europe.
2. (chimera) Tissue containing two genetically distinct types of cell, or an organism consisting of such tissue.
Mike Allaby
Biology
An organism composed of tissues that are genetically different. Chimaeras can develop if a mutation occurs in a cell of a developing embryo. All the cells arising from it have the mutation and therefore produce tissue that is genetically different from adjacent tissue, e.g. brown patches in otherwise blue eyes in humans. Graft hybrids are examples of plant chimaeras.