/ Dictionary / Index M melaxuma: Meaning and Definition of Find definitions for: mel•a•xu•ma Pronunciation: (mel"u-k'mu, -u-z'-, -uk-s'-), [key] — n. Plant Pathol. a disease of trees, esp. walnuts, characterized by an inky-black liquid oozing from the affected twigs, branches, and trunk, and by bark cankers, caused by any of several fungi, as Dothiorella gregaria. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. melatonin Melba Related Content Daily Word Quiz: abominable Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language