chimaera

A mythical fire-breathing monster with parts of a lion, goat, and serpent.

"The hero Bellerophon slew the fearsome chimaera."

An organism composed of cells from two or more distinct genetic origins.

"Scientists studied the genetic make-up of the chimaera."

An impossible, fanciful, or delusive idea or hope.

"His grand plans were nothing but a chimaera."