siamese twins

(n.) Twins joined toghether, sharing body parts or areas. Often, they share vital organs or limbs, and only one can survive. The origi is a pair of 19th cent. siamese babies that lived to be 70. They stayed together for thier entire lives, and even married twin sisters (not identical). They moved to the united states in the 1830's and worked in a circus. They eventually became farmers.