/ Dictionary / Index P Preludin: Meaning and Definition of Find definitions for: Pre•lu•din Pronunciation: (pri-ld'n, prā-), [key] — Pharm., Trademark. Pharm.,Trademark. a brand of phenmetrazine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. prelude prelusion Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language