/ Dictionary / Index N Neo-Synephrine: Meaning and Definition of Find definitions for: Ne•o-Sy•neph•rine Pronunciation: (nē"ō-si-nef'rin, -rēn), [key] — Pharm., Trademark. Pharm.,Trademark. a brand of phenylephrine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. neostyle neoteny Related Content Daily Word Quiz: diligent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language