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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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Origin of acanthodian

First recorded in 1850–55; from New Latin Acanthodi(i), plural of acanthodius (equivalent to Acanthod(es), a genus name (from Greek akanthṓdēs “prickly, spiny”) + Latin -ius ) + -an;see acantho-, -ode1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
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