The Collaborative International Dictionary of English v.0.48:

Bard \Bard\, n. [Akin to Dan. & Sw. bark, Icel. b["o]rkr, LG. &
   HG. borke.]
   1. The exterior covering of the trunk and branches of a tree;
      the rind.
      [1913 Webster]

   2. Specifically, Peruvian bark.
      [1913 Webster]

   Bark bed. See Bark stove (below).

   Bark pit, a pit filled with bark and water, in which hides
      are steeped in tanning.

   Bark stove (Hort.), a glazed structure for keeping tropical
      plants, having a bed of tanner's bark (called a bark bed)
      or other fermentable matter which produces a moist heat.
      [1913 Webster]