The Collaborative International Dictionary of English v.0.48:

Burbolt \Bur"bolt`\, n.
   A birdbolt. [Obs.] --Ford.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Burbot \Bur"bot\, n. [F. barbote, fr. barbe beard. See 1st
   Barb.] (Zool.)
   A fresh-water fish of the genus Lota, having on the nose
   two very small barbels, and a larger one on the chin.
   [Written also burbolt.]
   [1913 Webster]

   Note: The fish is also called an eelpout or ling, and is
         allied to the codfish. The Lota vulgaris is a common
         European species. An American species (Lota maculosa)
         is found in New England, the Great Lakes, and farther
         north.
         [1913 Webster]