/ Dictionary / Index M methoxy group: Meaning and Definition of Find definitions for: methox'y group" Pronunciation: [key] the univalent group CHO−. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. methoxyflurane Methuen Related Content Daily Word Quiz: diurnal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language