/ Dictionary / Index M methyl orange: Meaning and Definition of Find definitions for: meth'yl or'ange Pronunciation: [key] an orange-yellow, slightly water-soluble powder, CHNNaOS, used chiefly as an acid-base indicator. Also calledCf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. methyl oleate methylparaben Related Content Daily Word Quiz: penchant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language