Meaning of madtom

mad•tom

Pronunciation: (mad'tom'), [key]
— n.
  1. 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.