As a Noun: 1. CYSTIC FIBROSIS is a disease that affects the entire body. It causes difficulty breathing, poor growth, and progressive disability. Note: 1. There appears to be no commonly used Auslan sign for CYSTIC FIBROSIS. If you know a sign for CYSTIC FIBROSIS used by you or other Auslan users (deaf people or interpreters) please go to "missing sign feedback" and supply details. Thank you.