/ Dictionary / Index M madtom: Meaning and Definition of Find definitions for: mad•tom Pronunciation: (mad'tom'), [key] — n. any of several tadpolelike, freshwater catfishes of the genus Noturus, of the central and eastern U.S., having a poisonous pectoral spine: some are threatened or endangered. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. madrone Madura Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language