Source : Webster's Revised Unabridged Dictionary (1913)

Heterosomati \Het`e*ro*so"ma*ti\, n. pl. [NL., fr. Gr. ? other +
   ?, ?, body.] (Zo["o]l.)
   An order of fishes, comprising the flounders, halibut, sole,
   etc., having the body and head asymmetrical, with both eyes
   on one side. Called also {Heterosomata}, {Heterosomi}.

Source : WordNet®

Heterosomata
     n : flatfishes: halibut; sole; flounder; plaice; turbot;
         tonguefishes [syn: {order Heterosomata}, {order
         Pleuronectiformes}]