[ ak-tuh-nop-tuh-rij-ee-uh n ]
/ ˌæk təˌnɒp təˈrɪdʒ i ən /


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

Examples from the Web for actinopterygian

Science definitions for actinopterygian


[ ăk′tə-nŏp′tə-rĭjē-ən ]

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