/ Dictionary / Index P pellagra-preventive factor: Meaning and Definition of Find definitions for: pel•la'gra-pre•ven'tive fac"tor Pronunciation: (pu-lag'ru-pri-ven'tiv, -lā'gru-, -lä'-), [key] — Biochem. Biochem. nicotinic acid or its amide, nicotinamide, being the vitamin-B-complex members that serve to prevent pellagra. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pellagra pellagrin Related Content Daily Word Quiz: cur Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language