What does "ling" mean?

Ling: (a) A large, marine, gadoid fish (Molva vulgaris) of Northern Europe and Greenland. It is valued as a food fish and is largely salted and dried. Called also drizzle. (b) The burbot of Lake Ontario. (c) An American hake of the genus Phycis. [Canada] (d) A New Zealand food fish of the genus Genypterus. The name is also locally applied to other fishes, as the cultus cod, the mutton fish, and the cobia.