Breadcrumb Home > Dictionary > Index P pyridoxine: Meaning and Definition of Find definitions for: pyr•i•dox•ine Pronunciation: (pir"i-dok'sēn, -sin), [key] — n. Biochem. a derivative of pyridine, CHNO, occurring in whole-grain cereals, meats, fish, etc., and also made synthetically: required for the prevention of pellagra and the formation of hemoglobin; vitamin B. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pyridoxine (Thesaurus) pyridostigmine bromide pyriform ✖ Related Content Daily Word Quiz: centrifugal Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language