haddock Meaning, Definition & Usage

  1. noun lean white flesh of fish similar to but smaller than cod; usually baked or poached or as fillets sauteed or fried
  2. noun important food fish on both sides of the Atlantic; related to cod but usually smaller
    Melanogrammus aeglefinus.

WordNet

Had"dock noun
Etymology
OE. hadoc, haddok, of unknown origin; cf. Ir. codog, Gael. adag, F. hadot.
Definitions
  1. (Zoöl.) A marine food fish (Melanogrammus æglefinus), 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.

Webster 1913