The American Heritage® Dictionary of the English Language, 4th Edition
n. A disease of the lungs caused by continued inhalation of the dust of siliceous minerals and characterized by progressive fibrosis and a chronic shortness of breath.
n. A disease of the lungs caused by the inhalation of crystalline silica dust.
The Century Dictionary and Cyclopedia
n. Pneumonoconiosis in which the particles are of flint: same as chalicosis.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a lung disease caused by inhaling particles of silica or quartz or slate
Word Usage
"Fortunately wafer production does not require large amounts of silicon, which is good because exposure to silicon in mines or factories at greater levels can lead to respiratory problems and an incurable lung disease known as silicosis."