The Collaborative International Dictionary of English v.0.48:
Cod \Cod\, n. [Cf. G. gadde, and (in Heligoland) gadden, L.
gadus merlangus.] (Zool.)
An important edible fish (Gadus morrhua), taken in immense
numbers on the northern coasts of Europe and America. It is
especially abundant and large on the Grand Bank of
Newfoundland. It is salted and dried in large quantities.
Note: There are several varieties; as shore cod, from
shallow water; bank cod, from the distant banks; and
rock cod, which is found among ledges, and is often
dark brown or mottled with red. The tomcod is a
distinct species of small size. The bastard, blue,
buffalo, or cultus cod of the Pacific coast belongs
to a distinct family. See Buffalo cod, under
Cod fishery, the business of fishing for cod.
Cod line, an eighteen-thread line used in catching codfish.