Source : Webster's Revised Unabridged Dictionary (1913)

Crossopterygii \Cros*sop`te*ryg"i*i\ (kr?s-s?p`t?-r?j?-?), n.
   pl. [NL., fr. Gr. ??? tassels, a fringe + ?????, dim. of ????
   wing, fin.] (Zo["o]l.)
   An order of ganoid fishes including among living species the
   bichir ({Polypterus}). See {Brachioganoidei}.

Source : WordNet®

Crossopterygii
     n : fishes having paired fins resembling limbs and regarded as
         ancestral to amphibians [syn: {subclass Crossopterygii}]