/ Dictionary / Index P Prostigmin: Meaning and Definition of Find definitions for: Pro•stig•min Pronunciation: (prō-stig'min), [key] — Pharm., Trademark. Pharm.,Trademark. a brand of neostigmine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: prostigmin (Thesaurus) prostie prostitute Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language