mad·tom

[mad-tom]
noun
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.

Origin:
1895–1900, Americanism; mad + tom

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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madtom

any of several North American catfishes of the genus Noturus, of the family Ictaluridae. They are sometimes classified in two genera, Noturus and Schilbeodes. Generally about 5-7.5 cm (2-3 inches) long, madtoms are the smallest ictalurids and are characterized by a long adipose fin that in some species joins the rounded tail fin

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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00:10
Madtom is always a great word to know.
So is interrobang. Does it mean:
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
a chattering or flighty, light-headed person.
Example sentences
The madtom is shorter and stockier than the stonecat.
The chucky madtom prefers to nest beneath large, flat slabs of rock resting on a stream bed of pea-sized gravel.
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