The Collaborative International Dictionary
Melanogrammus aeglefinus
Haddock \Had"dock\ (-d[u^]k), n. [OE. hadok, haddok, of unknown origin; cf. Ir. codog, Gael. adag, F. hadot.] (Zo["o]l.) 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.
Norway haddock, a marine edible fish ( Sebastes marinus) of Northern Europe and America. See Rose fish.