/ Dictionary / Index S siderosis: Meaning and Definition of Find definitions for: sid•er•o•sis Pronunciation: (sid"u-rō'sis), [key] — n. Pathol. a disease of the lungs caused by inhaling iron or other metallic particles. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: siderosis (Thesaurus) sideroscope siderostat Related Content Daily Word Quiz: acerbity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language