/ Dictionary / Index P perchloromethane: Meaning and Definition of Find definitions for: per•chlo•ro•meth•ane Pronunciation: (pur-klôr"ō-meth'ān, -klōr"-), [key] — n. Chem. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: perchloromethane (Thesaurus) perchloroethylene Perchta 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