Source : Webster's Revised Unabridged Dictionary (1913)

Codfish \Cod"fish\, n. (Zo["o]l.)
   A kind of fish. Same as {Cod}.

Source : WordNet®

codfish
     n 1: lean white flesh of important North Atlantic food fish;
          usually baked or poached [syn: {cod}]
     2: major food fish of arctic and cold-temperate waters [syn: {cod}]
     [also: {codfishes} (pl)]