titi: small South American monkeys with long beautiful fur and long nonprehensile tail
living thing: a living (or once living) entity
charcot-marie-tooth disease: a form of neuropathy that can begin between childhood and young adulthood; characterized by weakness and atrophy of the muscles of the hands and lower legs; progression is slow and individuals affected can have a normal life span; inheritance is X-linked recessive or X-linked dominant