/ Dictionary / Index M methoxide: Meaning and Definition of Find definitions for: meth•ox•ide Pronunciation: (meth-ok'sīd, -sid), [key] — n. Chem. methylate (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. methought methoxsalen Related Content Daily Word Quiz: dissonant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language