Definition of acanthopterygian in English:

acanthopterygian

adjective

Zoology
  • Belonging to the class (or subclass) Acanthopterygii of ray-finned fishes; designating or relating to these fishes.

noun

Zoology
  • A fish of the class (or subclass) Acanthopterygii.

Origin

Mid 19th century; earliest use found in Proceedings of the Zoological Society of London. From acantho- + -pterygian, after scientific Latin Acanthopterygii Acanthopterygii.

Pronunciation:

acanthopterygian

/ˌakənˌθɒptəˈrɪdʒɪən/