Acanthopterygii acant·hop·te·rygii uncommon noun 1. teleost fishes having fins with sharp bony rays Synonymssuperorder Acanthopterygii Related words Broader terms animal order Parts Teleostei Part of BerycomorphiZeomorphiPediculatispiny-finned fishPerciformesDiscocephaliScleropareiScorpaenoidea WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.