silicosisPronunciation: /ˌsɪlɪˈkəʊsɪs/Definition of silicosis noun [mass noun] Medicine lung fibrosis caused by the inhalation of dust containing silica. Derivatives silicoticPronunciation: /-ˈkɒtɪk/ adjective silicosis in other Oxford dictionaries Definition of silicosis in the US English dictionary