silicosis Syllabification: (sil·i·co·sis)Pronunciation: /ˌsiləˈkōsis/Definition of silicosis noun Medicine lung fibrosis caused by the inhalation of dust containing silica. Derivatives silicoticPronunciation: /ˌsiləˈkätik/ adjective silicosis in other Oxford dictionaries Definition of silicosis in the British & World English dictionary