[ ak-uhn-thoh-dee-uhn ]

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

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

Words Nearby acanthodian Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use acanthodian in a sentence