/ Dictionary / Index P pentamethylenediamine: Meaning and Definition of Find definitions for: pen•ta•meth•yl•ene•di•a•mine Pronunciation: (pen"tu-meth'u-lēn-dī'u-mēn", -min, -dī"u-mēn'), [key] — n. Biochem. cadaverine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pentamethylene pentamidine Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language