Meaning of actinopterygian

ac•ti•nop•te•ryg•i•an

Pronunciation: (ak"tu-nop"tu-rij'ē-un), [key]
— adj.
  1. belonging or pertaining to the Actinopterygii, a group of bony fishes.
—n.
  1. an actinopterygian fish.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.