/ Dictionary / Index M methyl chloride: Meaning and Definition of Find definitions for: meth'yl chlo'ride Pronunciation: [key] a colorless, poisonous gas, CHCl, used chiefly as a refrigerant, as a local anesthetic, and as a methylating agent in organic synthesis. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. methyl cellulose methyl chloroformate Related Content Daily Word Quiz: serendipity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language