acanthopterygii

from WordNet (r) 3.0 (2006)

Acanthopterygii
    n 1: teleost fishes having fins with sharp bony rays [syn:
         {Acanthopterygii}, {superorder Acanthopterygii}]

from The Collaborative International Dictionary of English v.0.48

Acanthopterygii \Ac`an*thop`ter*yg"i*i\, n. pl. [NL., from Gr. ?
   thorn + ? fin, dim. fr. ? wing.] (Zool.)
   An order of fishes having some of the rays of the dorsal,
   ventral, and anal fins unarticulated and spinelike, as the
   perch.
   [1913 Webster]