Source : Webster's Revised Unabridged Dictionary (1913)

Ling \Ling\, n. [Icel. lyng; akin to Dan. lyng, Sw. ljung.]
   (Bot.)
   Heather ({Calluna vulgaris}).

   {Ling honey}, a sort of wild honey, made from the flowers of
      the heather. --Holland.

Ling \Ling\ (l[i^]ng), n. [OE. lenge; akin to D. leng, G.
   l["a]nge, Dan. lange, Sw. l[*a]nga, Icel. langa. So named
   from its being long. See {Long}, a.] (Zo["o]l.)
   (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.

Source : WordNet®

ling
     n 1: water chestnut whose spiny fruit has two rather than 4
          prongs [syn: {ling ko}, {Trapa bicornis}]
     2: common Old World heath represented by many varieties; low
        evergreen grown widely in the northern hemisphere [syn: {heather},
         {Scots heather}, {broom}, {Calluna vulgaris}]
     3: elongated marine food fish of Greenland and northern Europe;
        often salted and dried [syn: {Molva molva}]
     4: American hakes
     5: elongate freshwater cod of northern Europe and Asia and
        North America having barbels around its mouth [syn: {burbot},
         {eelpout}, {cusk}, {Lota lota}]