Source : Webster's Revised Unabridged Dictionary (1913)

Isospondyli \I`so*spon"dy*li\, n. pl. [NL., fr. Gr. 'i`sos equal
   + ?, ?, a vertebra.] (Zo["o]l.)
   An extensive order of fishes, including the salmons,
   herrings, and many allied forms.

Source : WordNet®

Isospondyli
     n : most primitive teleost fishes; all are soft-finned: salmon;
         trout; herring; shad; sardines; anchovies; whitefish;
         smelts; tarpon [syn: {order Isospondyli}]