Chimeric (adjective)

1. Fantastically improbable; highly unrealistic.
2. Being a genetic chimera; composed of genetically distinct cells from two or more individuals.

Origin:

Late latin chīmēricus, from latin chimēra mythical fire-breathing monster, from greek khimaira.

Examples:

1. His idea of a flying car was considered a chimeric dream.
2. The scientist was studying the unique characteristics of chimeric mice.
3. Her paintings were filled with chimeric creatures that blended together in unexpected ways.
4. His chimeric plan to solve world hunger was met with skepticism.
5. The chimeric experiment resulted in a plant that was resistant to multiple diseases.