Alternative letter-case form of Chimera (a flame-spewing monster often represented as having two heads, one of a goat and the other of a lion; the body of a goat; and a serpent as a tail).
Usually chimaera: a cartilaginous marine fish in the subclass Holocephali and especially the order Chimaeriformes, with a blunt snout, long tail, and a spine before the first dorsal fin.