cystic fi ‧ bro ‧ sis /ˌsɪstɪk faɪˈbrəʊsəs $ -ˈbroʊ-/ BrE AmE noun [uncountable]
[ Date: 1900-2000 ; Origin: fibrosis 'increase of fiber in a part of the body' 1800-1900 Modern Latin , from Latin fibra ; ⇨ ↑ fiber ]
a serious medical condition, especially affecting children, in which breathing and ↑ digest ing food is very difficult