Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Any of several small freshwater North American catfishes of the genus Noturus, having poison glands at the base of the pectoral and dorsal fin spines.

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[mad + tom(cat) (probably so called because the fish swim in an excited zigzag manner when agitated).]

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  • A common name for a kind of ictalurid catfish.

    June 27, 2010