Polycephaly is the condition of having more than one head.

In Mel's bathroom, she has a picture of Bret and Jemaine's head on the same naked body (polycephaly).

Another notably deformed fossil was a specimen of the choristodere Hyphalosaurus, which had two heads- the oldest known example of polycephaly.

The family has refused special medical care, and recent reports state that the case is not one of polycephaly, but a condition called craniofacial duplication, a rare congenital disorder.

Animals born with two heads, a condition known as polycephaly, are "pretty darn rare" and usually die shortly after birth, said Eldon Cole, a livestock expert with the University of Missouri Extension.

The calf appears to have been born with a cephalic disorder such as polycephaly, a condition which means having more than one head and is most commonly seen in turtles and snakes.