/ Dictionary / Index P pantothenic acid: Meaning and Definition of Find definitions for: pan'to•then'ic ac'id Pronunciation: (pan'tu-then'ik, pan"-), [key] — Biochem. Biochem. a hydroxy acid, CHON, found in plant and animal tissues, rice, bran, etc., that is part of the B complex of vitamins and is essential for cell growth. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pantonality pantothere 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