acanthopterygian Meaning, Definition & Usage

  1. noun a teleost fish with fins that are supported by sharp inflexible rays
    spiny-finned fish.

WordNet

Ac`an*thop`ter*yg"i*an adjective
Definitions
  1. (Zoöl.) Belonging to the order of fishes having spinose fins, as the perch. -- n. A spiny-finned fish.

Webster 1913