The Collaborative International Dictionary
Acanthopterygious
Acanthopterygious \Ac`an*thop`ter*yg"i*ous\, a. (Zo["o]l.) Having fins in which the rays are hard and spinelike; spiny-finned.
Wiktionary
acanthopterygious
a. (context zoology English) Having fins in which the rays are hard and spinelike; spiny-finned.