/ Dictionary / Index P perchloroethylene: Meaning and Definition of Find definitions for: per•chlo•ro•eth•yl•ene Pronunciation: (pur-klôr"ō-eth'u-lēn", -klōr"-), [key] — n. Chem. tetrachloroethylene. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. perchloroethane perchloromethane Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language