Source : Webster's Revised Unabridged Dictionary (1913)

Perciformes \Per`ci*for"mes\, n. pl. [NL.] (Zo["o]l.)
   An extensive tribe or suborder of fishes, including the true
   perches ({Percid[ae]}); the pondfishes ({Centrarchid[ae]});
   the sci[ae]noids ({Sci[ae]nid[ae]}); the sparoids
   ({Sparid[ae]}); the serranoids ({Serranid[ae]}), and some
   other related families.

Source : WordNet®

Perciformes
     n : one of the largest natural groups of fishes of both marine
         and fresh water: true perches; basses; tuna [syn: {order
         Perciformes}, {Percomorphi}, {order Percomorphi}]