[ak-tuh-nop-tuh-rij-ee-uh n]


belonging or pertaining to the Actinopterygii, a group of bony fishes.


an actinopterygian fish.

Origin of actinopterygian

< New Latin Actinopterygi(i) (plural) (actino- actino- + Greek pterýgi(on) fin, equivalent to pteryg- (stem of ptéryx wing) + -ion diminutive suffix) + -an Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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Historical Examples of actinopterygian

actinopterygian in Science



See ray-finned fish.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.