acanthodian
[ ak-uhn-thoh-dee-uhn ]
/ ˌæk ənˈθoʊ di ən /
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noun
any small, spiny-finned, sharklike fish of the extinct order Acanthodii, from the Paleozoic Era.
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Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
Example sentences from the Web for acanthodian
There is no evidence that the lateral row of spines in the acanthodian Climatius has any other than a defensive significance.