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acanthodian

American  
[ak-uhn-thoh-dee-uhn] / ˌæk ənˈθoʊ di ən /

noun

  1. any small, spiny-finned, sharklike fish of the extinct order Acanthodii, from the Paleozoic Era.

Etymology

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; acantho-, -ode 1

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.