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