Melanogrammus aeglefinus

from WordNet (r) 3.0 (2006)

Melanogrammus aeglefinus
    n 1: important food fish on both sides of the Atlantic; related
         to cod but usually smaller [syn: {haddock}, {Melanogrammus
         aeglefinus}]

from The Collaborative International Dictionary of English v.0.48

Haddock \Had"dock\ (-d[u^]k), n. [OE. hadok, haddok, of unknown
   origin; cf. Ir. codog, Gael. adag, F. hadot.] (Zool.)
   A marine food fish ({Melanogrammus [ae]glefinus}), allied to
   the cod, inhabiting the northern coasts of Europe and
   America. It has a dark lateral line and a black spot on each
   side of the body, just back of the gills. Galled also
   {haddie}, and {dickie}.
   [1913 Webster]

   {Norway haddock}, a marine edible fish ({Sebastes marinus})
      of Northern Europe and America. See {Rose fish}.
      [1913 Webster]