What is "acanthopterygian"

Acanthopterygian \Ac`an*thop`ter*yg"i*an\, a. (Zo["o]l.) Belonging to the order of fishes having spinose fins, as the perch. -- n. A spiny-finned fish. [1913 Webster] ||

a. (context zoology English) Similar to a acanthopterygian.(First attested in the mid 19th century.) n. (context zoology English) Any fish of the superorder Acanthopterygii.(First attested in the mid 19th century.)Brown, Lesley, ed. ''The Shorter Oxford English Dictionary.'' 5th. Oxford: Oxford University Press, 2003.

n. a teleost fish with fins that are supported by sharp inflexible rays [syn: spiny-finned fish] [ant: soft-finned fish]