/ Dictionary / Index C collagen disease: Meaning and Definition of Find definitions for: col'lagen disease" Pronunciation: [key] — Pathol. Pathol. any of a group of diseases, as systemic lupus erythematosus, polyarteritis, scleroderma, and rheumatoid arthritis, involving inflammation or degeneration of connective tissue and accompanied by deposition of fibrinous material. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. collagen collapsar Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language