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]