/ Dictionary / Index P penicillamine: Meaning and Definition of Find definitions for: pen•i•cil•la•mine Pronunciation: (pen"u-sil'u-mēn", -min), [key] — n. Pharm. a chelating agent, CHNOS, produced by the degradation of penicillin, used in the treatment of severe rheumatoid arthritis and in heavy metal poisoning. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: penicillamine (Thesaurus) penicil penicillate Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language