/ Dictionary / Index I intrinsic factor: Meaning and Definition of Find definitions for: intrin'sic fac"tor Pronunciation: [key] — Biochem. Biochem. a glycoprotein, secreted by the gastric mucosa, that is involved in the intestinal absorption of vitamin B. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. intrinsic intrinsic parity Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language