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.

Source : WordNet®

Calluna vulgaris
     n : common Old World heath represented by many varieties; low
         evergreen grown widely in the northern hemisphere [syn: {heather},
          {ling}, {Scots heather}, {broom}]