/ Dictionary / Index P pneumoconiosis: Meaning and Definition of Find definitions for: pneu•mo•co•ni•o•sis Pronunciation: (n"mu-kō"nē-ō'sis, ny"-), [key] — n. Pathol. any chronic lung disease, including anthracosis, asbestosis, and silicosis, caused by the inhalation of particles of coal, asbestos, silica, or similar substances and leading to fibrosis and loss of lung function. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pneumoconiosis (Thesaurus) pneumococcus pneumocystis pneumonia Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language